/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:21:58,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:21:58,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:21:58,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:21:58,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:21:58,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:21:58,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:21:58,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:21:58,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:21:58,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:21:58,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:21:58,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:21:58,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:21:58,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:21:58,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:21:58,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:21:58,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:21:58,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:21:58,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:21:58,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:21:58,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:21:58,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:21:58,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:21:58,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:21:58,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:21:58,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:21:58,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:21:58,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:21:58,118 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:21:58,127 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:21:58,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:21:58,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:21:58,128 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:21:58,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:21:58,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:21:58,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:21:58,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:21:58,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:21:58,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:21:58,130 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:21:58,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:21:58,130 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:21:58,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:21:58,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:21:58,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:21:58,131 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:21:58,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:21:58,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:21:58,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:21:58,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:21:58,132 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:21:58,133 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:21:58,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:21:58,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:21:58,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:21:58,442 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:21:58,443 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:21:58,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2021-05-06 08:21:58,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/297d2c9f2/2f4f24402a4848f0a71a5a3b7a6494c4/FLAG50eeb7931 [2021-05-06 08:21:58,973 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:21:58,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2021-05-06 08:21:58,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/297d2c9f2/2f4f24402a4848f0a71a5a3b7a6494c4/FLAG50eeb7931 [2021-05-06 08:21:58,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/297d2c9f2/2f4f24402a4848f0a71a5a3b7a6494c4 [2021-05-06 08:21:58,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:21:59,002 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:21:59,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:21:59,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:21:59,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:21:59,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:21:58" (1/1) ... [2021-05-06 08:21:59,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61251e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:59, skipping insertion in model container [2021-05-06 08:21:59,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:21:58" (1/1) ... [2021-05-06 08:21:59,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:21:59,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:21:59,182 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2021-05-06 08:21:59,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:21:59,221 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:21:59,233 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2021-05-06 08:21:59,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:21:59,306 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:21:59,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:59 WrapperNode [2021-05-06 08:21:59,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:21:59,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:21:59,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:21:59,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:21:59,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:59" (1/1) ... [2021-05-06 08:21:59,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:59" (1/1) ... [2021-05-06 08:21:59,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:59" (1/1) ... [2021-05-06 08:21:59,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:59" (1/1) ... [2021-05-06 08:21:59,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:59" (1/1) ... [2021-05-06 08:21:59,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:59" (1/1) ... [2021-05-06 08:21:59,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:59" (1/1) ... [2021-05-06 08:21:59,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:21:59,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:21:59,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:21:59,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:21:59,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:21:59,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:21:59,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:21:59,444 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:21:59,444 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:21:59,445 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:21:59,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:21:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:21:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:21:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:21:59,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:21:59,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:21:59,446 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:21:59,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:21:59,446 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:21:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:21:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:21:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:21:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:21:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:21:59,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:21:59,758 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:21:59,758 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:21:59,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:21:59 BoogieIcfgContainer [2021-05-06 08:21:59,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:21:59,761 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:21:59,761 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:21:59,761 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:21:59,763 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:21:59" (1/1) ... [2021-05-06 08:21:59,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:21:59 BasicIcfg [2021-05-06 08:21:59,776 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:21:59,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:21:59,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:21:59,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:21:59,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:21:58" (1/4) ... [2021-05-06 08:21:59,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186d24d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:21:59, skipping insertion in model container [2021-05-06 08:21:59,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:21:59" (2/4) ... [2021-05-06 08:21:59,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186d24d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:21:59, skipping insertion in model container [2021-05-06 08:21:59,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:21:59" (3/4) ... [2021-05-06 08:21:59,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186d24d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:21:59, skipping insertion in model container [2021-05-06 08:21:59,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:21:59" (4/4) ... [2021-05-06 08:21:59,783 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.cJordan [2021-05-06 08:21:59,787 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:21:59,790 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:21:59,804 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:21:59,834 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:21:59,834 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:21:59,834 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:21:59,834 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:21:59,834 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:21:59,835 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:21:59,835 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:21:59,835 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:21:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:21:59,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:21:59,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:21:59,857 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:21:59,857 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:21:59,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:21:59,862 INFO L82 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2021-05-06 08:21:59,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:21:59,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565778690] [2021-05-06 08:21:59,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:21:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:00,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:22:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:00,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:22:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:00,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:22:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:22:00,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:00,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565778690] [2021-05-06 08:22:00,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565778690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:00,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:00,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:22:00,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561296149] [2021-05-06 08:22:00,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:22:00,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:00,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:22:00,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:00,180 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:00,316 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-05-06 08:22:00,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:22:00,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 08:22:00,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:00,323 INFO L225 Difference]: With dead ends: 41 [2021-05-06 08:22:00,323 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 08:22:00,325 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:00,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 08:22:00,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-06 08:22:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:22:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-06 08:22:00,352 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-06 08:22:00,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:00,352 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-06 08:22:00,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:00,353 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-06 08:22:00,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:22:00,354 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:00,354 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:00,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:22:00,354 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:00,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:00,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2021-05-06 08:22:00,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:00,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316830372] [2021-05-06 08:22:00,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:00,369 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:00,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648817581] [2021-05-06 08:22:00,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:00,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:22:00,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:00,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:22:00,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:00,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316830372] [2021-05-06 08:22:00,544 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:00,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648817581] [2021-05-06 08:22:00,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648817581] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:00,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:00,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:22:00,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096014437] [2021-05-06 08:22:00,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:22:00,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:00,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:22:00,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:22:00,547 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:00,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:00,560 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-06 08:22:00,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:22:00,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:22:00,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:00,561 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:22:00,561 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 08:22:00,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:22:00,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 08:22:00,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 08:22:00,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:22:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-06 08:22:00,567 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-06 08:22:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:00,568 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-06 08:22:00,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:00,569 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-06 08:22:00,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 08:22:00,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:00,569 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:00,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:22:00,792 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:00,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:00,793 INFO L82 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2021-05-06 08:22:00,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:00,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681208168] [2021-05-06 08:22:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:00,811 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:00,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068518104] [2021-05-06 08:22:00,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:00,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:00,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:00,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:22:00,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:00,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681208168] [2021-05-06 08:22:00,987 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:00,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068518104] [2021-05-06 08:22:00,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068518104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:00,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:00,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:22:00,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317183962] [2021-05-06 08:22:00,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:22:00,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:00,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:22:00,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:00,989 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:22:01,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:01,086 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-05-06 08:22:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:01,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-06 08:22:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:01,087 INFO L225 Difference]: With dead ends: 50 [2021-05-06 08:22:01,087 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 08:22:01,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:01,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 08:22:01,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-06 08:22:01,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:22:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-06 08:22:01,102 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-06 08:22:01,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:01,102 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-06 08:22:01,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:22:01,102 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-06 08:22:01,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:22:01,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:01,103 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:01,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:01,304 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:01,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2021-05-06 08:22:01,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:01,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102069660] [2021-05-06 08:22:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:01,317 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:01,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551394762] [2021-05-06 08:22:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:01,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:01,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:01,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:22:01,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:01,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102069660] [2021-05-06 08:22:01,507 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:01,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551394762] [2021-05-06 08:22:01,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551394762] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:01,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:01,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:01,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260406260] [2021-05-06 08:22:01,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:01,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:01,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:01,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:01,513 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:01,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:01,546 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-06 08:22:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:22:01,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 08:22:01,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:01,547 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:22:01,548 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 08:22:01,548 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 08:22:01,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-06 08:22:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:22:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-06 08:22:01,552 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-06 08:22:01,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:01,552 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-06 08:22:01,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:01,553 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-06 08:22:01,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:22:01,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:01,554 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:01,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:01,769 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:01,769 INFO L82 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2021-05-06 08:22:01,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:01,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373869777] [2021-05-06 08:22:01,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:01,785 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:01,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198265915] [2021-05-06 08:22:01,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:01,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:01,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:01,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:22:01,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:01,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373869777] [2021-05-06 08:22:01,975 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:01,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198265915] [2021-05-06 08:22:01,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198265915] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:01,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:01,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:22:01,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522502598] [2021-05-06 08:22:01,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:01,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:01,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:01,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:01,977 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:22:02,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:02,087 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2021-05-06 08:22:02,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:22:02,088 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-05-06 08:22:02,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:02,090 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:22:02,091 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:22:02,091 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:22:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 08:22:02,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:22:02,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-05-06 08:22:02,097 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2021-05-06 08:22:02,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:02,097 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-05-06 08:22:02,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:22:02,098 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-05-06 08:22:02,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 08:22:02,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:02,099 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:02,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:02,315 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:02,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:02,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2021-05-06 08:22:02,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:02,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444776440] [2021-05-06 08:22:02,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:02,326 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:02,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469546737] [2021-05-06 08:22:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:22:02,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:02,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:22:02,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:02,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444776440] [2021-05-06 08:22:02,482 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:02,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469546737] [2021-05-06 08:22:02,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469546737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:02,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:02,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:22:02,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262725229] [2021-05-06 08:22:02,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:22:02,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:02,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:22:02,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:02,484 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:02,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:02,550 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-05-06 08:22:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:22:02,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-05-06 08:22:02,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:02,552 INFO L225 Difference]: With dead ends: 60 [2021-05-06 08:22:02,552 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 08:22:02,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 08:22:02,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 08:22:02,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:22:02,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-05-06 08:22:02,558 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2021-05-06 08:22:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:02,559 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-05-06 08:22:02,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-05-06 08:22:02,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 08:22:02,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:02,560 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:02,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:22:02,786 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:02,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:02,787 INFO L82 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2021-05-06 08:22:02,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:02,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377813240] [2021-05-06 08:22:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:02,798 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:02,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786528180] [2021-05-06 08:22:02,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:22:02,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:02,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:22:02,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:02,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377813240] [2021-05-06 08:22:02,956 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:02,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786528180] [2021-05-06 08:22:02,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786528180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:02,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:02,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:02,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139885813] [2021-05-06 08:22:02,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:02,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:02,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:02,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:02,958 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:03,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:03,168 INFO L93 Difference]: Finished difference Result 131 states and 193 transitions. [2021-05-06 08:22:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:22:03,169 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-06 08:22:03,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:03,172 INFO L225 Difference]: With dead ends: 131 [2021-05-06 08:22:03,172 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 08:22:03,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:03,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 08:22:03,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-05-06 08:22:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:22:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-05-06 08:22:03,192 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2021-05-06 08:22:03,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:03,192 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-05-06 08:22:03,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:03,193 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-05-06 08:22:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:22:03,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:03,193 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:03,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:03,421 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:03,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:03,422 INFO L82 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2021-05-06 08:22:03,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:03,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487319194] [2021-05-06 08:22:03,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:03,447 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:03,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48375189] [2021-05-06 08:22:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:03,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:03,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:03,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:03,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:03,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:03,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:03,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:22:03,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:03,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487319194] [2021-05-06 08:22:03,655 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:03,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48375189] [2021-05-06 08:22:03,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48375189] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:03,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:03,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:22:03,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209046094] [2021-05-06 08:22:03,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:03,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:03,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:03,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:03,657 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:22:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:03,747 INFO L93 Difference]: Finished difference Result 93 states and 126 transitions. [2021-05-06 08:22:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:22:03,750 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-05-06 08:22:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:03,751 INFO L225 Difference]: With dead ends: 93 [2021-05-06 08:22:03,751 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 08:22:03,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 08:22:03,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 08:22:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 70 states have internal predecessors, (93), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:22:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-05-06 08:22:03,759 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 34 [2021-05-06 08:22:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:03,759 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-05-06 08:22:03,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:22:03,759 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-05-06 08:22:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 08:22:03,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:03,760 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:03,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:03,969 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:03,970 INFO L82 PathProgramCache]: Analyzing trace with hash 541001134, now seen corresponding path program 1 times [2021-05-06 08:22:03,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:03,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329348720] [2021-05-06 08:22:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:03,981 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:03,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254895104] [2021-05-06 08:22:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:04,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:22:04,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:04,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:22:04,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:04,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329348720] [2021-05-06 08:22:04,181 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:04,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254895104] [2021-05-06 08:22:04,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254895104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:04,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:04,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:22:04,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590736550] [2021-05-06 08:22:04,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:22:04,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:04,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:22:04,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:04,183 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:04,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:04,216 INFO L93 Difference]: Finished difference Result 94 states and 127 transitions. [2021-05-06 08:22:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:04,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-05-06 08:22:04,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:04,220 INFO L225 Difference]: With dead ends: 94 [2021-05-06 08:22:04,220 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 08:22:04,220 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 08:22:04,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-06 08:22:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 72 states have internal predecessors, (95), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:22:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2021-05-06 08:22:04,229 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 35 [2021-05-06 08:22:04,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:04,229 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2021-05-06 08:22:04,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2021-05-06 08:22:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:22:04,230 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:04,230 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:04,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:22:04,437 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:04,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1873858129, now seen corresponding path program 1 times [2021-05-06 08:22:04,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:04,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828561208] [2021-05-06 08:22:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:04,448 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:04,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30384271] [2021-05-06 08:22:04,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:04,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:22:04,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:04,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:22:04,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:04,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828561208] [2021-05-06 08:22:04,619 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:04,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30384271] [2021-05-06 08:22:04,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30384271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:04,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:04,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:22:04,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044669802] [2021-05-06 08:22:04,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:22:04,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:22:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:04,621 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:04,675 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2021-05-06 08:22:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:22:04,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-06 08:22:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:04,676 INFO L225 Difference]: With dead ends: 120 [2021-05-06 08:22:04,676 INFO L226 Difference]: Without dead ends: 120 [2021-05-06 08:22:04,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:04,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-06 08:22:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-05-06 08:22:04,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:22:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-05-06 08:22:04,682 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 36 [2021-05-06 08:22:04,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:04,683 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-05-06 08:22:04,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:04,683 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-05-06 08:22:04,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:22:04,684 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:04,684 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:04,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:04,897 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2021-05-06 08:22:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:04,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131063794] [2021-05-06 08:22:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:04,911 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:04,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910078600] [2021-05-06 08:22:04,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:04,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:22:04,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:05,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:22:05,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:05,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131063794] [2021-05-06 08:22:05,119 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:05,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910078600] [2021-05-06 08:22:05,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910078600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:05,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:05,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:22:05,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439284077] [2021-05-06 08:22:05,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:05,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:05,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:05,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:05,120 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:05,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:05,251 INFO L93 Difference]: Finished difference Result 152 states and 206 transitions. [2021-05-06 08:22:05,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:05,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-06 08:22:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:05,255 INFO L225 Difference]: With dead ends: 152 [2021-05-06 08:22:05,255 INFO L226 Difference]: Without dead ends: 152 [2021-05-06 08:22:05,255 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:05,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-06 08:22:05,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-05-06 08:22:05,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-06 08:22:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-05-06 08:22:05,267 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2021-05-06 08:22:05,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:05,268 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-05-06 08:22:05,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-05-06 08:22:05,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:22:05,270 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:05,270 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:05,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:05,471 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:05,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:05,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1011444142, now seen corresponding path program 2 times [2021-05-06 08:22:05,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:05,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878250351] [2021-05-06 08:22:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:05,493 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:05,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673331414] [2021-05-06 08:22:05,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:05,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:05,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:05,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:22:05,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:05,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:22:05,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:05,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878250351] [2021-05-06 08:22:05,690 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:05,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673331414] [2021-05-06 08:22:05,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673331414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:05,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:05,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:05,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096628183] [2021-05-06 08:22:05,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:05,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:05,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:05,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:05,693 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:05,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:05,771 INFO L93 Difference]: Finished difference Result 182 states and 239 transitions. [2021-05-06 08:22:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:22:05,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-05-06 08:22:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:05,772 INFO L225 Difference]: With dead ends: 182 [2021-05-06 08:22:05,773 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 08:22:05,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:05,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 08:22:05,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-05-06 08:22:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.31496062992126) internal successors, (167), 129 states have internal predecessors, (167), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:22:05,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2021-05-06 08:22:05,779 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 37 [2021-05-06 08:22:05,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:05,780 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2021-05-06 08:22:05,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:05,780 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2021-05-06 08:22:05,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:22:05,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:05,781 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:05,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:22:05,997 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:05,997 INFO L82 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2021-05-06 08:22:05,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:05,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476776677] [2021-05-06 08:22:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:06,004 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:06,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933176221] [2021-05-06 08:22:06,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:06,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:06,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:06,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 08:22:06,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:06,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476776677] [2021-05-06 08:22:06,202 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:06,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933176221] [2021-05-06 08:22:06,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933176221] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:06,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:06,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 08:22:06,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679567013] [2021-05-06 08:22:06,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:06,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:06,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:06,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:06,203 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:06,330 INFO L93 Difference]: Finished difference Result 193 states and 254 transitions. [2021-05-06 08:22:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:06,330 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 08:22:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:06,332 INFO L225 Difference]: With dead ends: 193 [2021-05-06 08:22:06,333 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 08:22:06,333 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:06,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 08:22:06,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 08:22:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 141 states have internal predecessors, (181), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:22:06,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-05-06 08:22:06,340 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 39 [2021-05-06 08:22:06,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:06,340 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-05-06 08:22:06,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-05-06 08:22:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:22:06,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:06,341 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:06,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:22:06,565 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:06,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:06,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2021-05-06 08:22:06,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:06,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840777144] [2021-05-06 08:22:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:06,574 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:06,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276886731] [2021-05-06 08:22:06,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:06,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:22:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:06,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:22:06,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:06,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840777144] [2021-05-06 08:22:06,811 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:06,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276886731] [2021-05-06 08:22:06,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276886731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:06,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:06,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:22:06,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797528794] [2021-05-06 08:22:06,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:22:06,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:06,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:22:06,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:06,812 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:22:07,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:07,047 INFO L93 Difference]: Finished difference Result 202 states and 261 transitions. [2021-05-06 08:22:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:07,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-05-06 08:22:07,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:07,049 INFO L225 Difference]: With dead ends: 202 [2021-05-06 08:22:07,049 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 08:22:07,049 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 08:22:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-05-06 08:22:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 145 states have (on average 1.289655172413793) internal successors, (187), 147 states have internal predecessors, (187), 37 states have call successors, (37), 18 states have call predecessors, (37), 17 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:22:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 259 transitions. [2021-05-06 08:22:07,057 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 259 transitions. Word has length 41 [2021-05-06 08:22:07,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:07,057 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 259 transitions. [2021-05-06 08:22:07,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:22:07,057 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 259 transitions. [2021-05-06 08:22:07,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:22:07,058 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:07,058 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:07,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:22:07,277 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:07,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:07,277 INFO L82 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2021-05-06 08:22:07,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:07,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443462945] [2021-05-06 08:22:07,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:07,286 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:07,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028658153] [2021-05-06 08:22:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:07,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:07,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:07,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:22:07,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:07,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443462945] [2021-05-06 08:22:07,433 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:07,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028658153] [2021-05-06 08:22:07,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028658153] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:07,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:07,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:07,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769165335] [2021-05-06 08:22:07,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:07,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:07,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:07,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:07,434 INFO L87 Difference]: Start difference. First operand 200 states and 259 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:22:07,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:07,479 INFO L93 Difference]: Finished difference Result 262 states and 359 transitions. [2021-05-06 08:22:07,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:22:07,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-05-06 08:22:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:07,481 INFO L225 Difference]: With dead ends: 262 [2021-05-06 08:22:07,481 INFO L226 Difference]: Without dead ends: 262 [2021-05-06 08:22:07,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-06 08:22:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 234. [2021-05-06 08:22:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 158 states have (on average 1.2911392405063291) internal successors, (204), 165 states have internal predecessors, (204), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:22:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 316 transitions. [2021-05-06 08:22:07,502 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 316 transitions. Word has length 44 [2021-05-06 08:22:07,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:07,502 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 316 transitions. [2021-05-06 08:22:07,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:22:07,503 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 316 transitions. [2021-05-06 08:22:07,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:07,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:07,504 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:07,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:07,729 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:07,729 INFO L82 PathProgramCache]: Analyzing trace with hash -982799261, now seen corresponding path program 1 times [2021-05-06 08:22:07,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:07,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473016577] [2021-05-06 08:22:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:07,737 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:07,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115097482] [2021-05-06 08:22:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:07,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:22:07,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:07,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:22:07,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:07,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473016577] [2021-05-06 08:22:07,918 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:07,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115097482] [2021-05-06 08:22:07,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115097482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:07,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:07,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:07,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273039703] [2021-05-06 08:22:07,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:07,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:07,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:07,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:07,919 INFO L87 Difference]: Start difference. First operand 234 states and 316 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:08,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:08,008 INFO L93 Difference]: Finished difference Result 245 states and 326 transitions. [2021-05-06 08:22:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:22:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-05-06 08:22:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:08,015 INFO L225 Difference]: With dead ends: 245 [2021-05-06 08:22:08,015 INFO L226 Difference]: Without dead ends: 245 [2021-05-06 08:22:08,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-06 08:22:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2021-05-06 08:22:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 165 states have (on average 1.2787878787878788) internal successors, (211), 171 states have internal predecessors, (211), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:22:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 323 transitions. [2021-05-06 08:22:08,025 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 323 transitions. Word has length 42 [2021-05-06 08:22:08,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:08,026 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 323 transitions. [2021-05-06 08:22:08,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:08,026 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 323 transitions. [2021-05-06 08:22:08,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:22:08,026 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:08,027 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:08,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:22:08,241 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:08,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1867030118, now seen corresponding path program 2 times [2021-05-06 08:22:08,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:08,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422328131] [2021-05-06 08:22:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:08,247 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:08,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745612660] [2021-05-06 08:22:08,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:08,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:08,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:08,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:22:08,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:08,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-06 08:22:08,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:08,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422328131] [2021-05-06 08:22:08,397 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:08,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745612660] [2021-05-06 08:22:08,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745612660] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:08,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:08,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:08,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171142122] [2021-05-06 08:22:08,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:08,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:08,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:08,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:08,398 INFO L87 Difference]: Start difference. First operand 241 states and 323 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:22:08,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:08,468 INFO L93 Difference]: Finished difference Result 379 states and 553 transitions. [2021-05-06 08:22:08,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:08,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-05-06 08:22:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:08,471 INFO L225 Difference]: With dead ends: 379 [2021-05-06 08:22:08,471 INFO L226 Difference]: Without dead ends: 379 [2021-05-06 08:22:08,471 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-06 08:22:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 265. [2021-05-06 08:22:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 189 states have (on average 1.2962962962962963) internal successors, (245), 195 states have internal predecessors, (245), 57 states have call successors, (57), 19 states have call predecessors, (57), 18 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 08:22:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2021-05-06 08:22:08,483 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 43 [2021-05-06 08:22:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:08,483 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2021-05-06 08:22:08,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:22:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2021-05-06 08:22:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:22:08,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:08,484 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:08,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:22:08,701 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:08,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1204922772, now seen corresponding path program 1 times [2021-05-06 08:22:08,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:08,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3595549] [2021-05-06 08:22:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:08,709 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:08,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179732263] [2021-05-06 08:22:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:08,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:22:08,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:08,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 08:22:08,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:08,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3595549] [2021-05-06 08:22:08,898 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:08,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179732263] [2021-05-06 08:22:08,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179732263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:08,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:08,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:08,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616730339] [2021-05-06 08:22:08,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:08,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:08,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:08,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:08,899 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:22:09,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:09,189 INFO L93 Difference]: Finished difference Result 339 states and 477 transitions. [2021-05-06 08:22:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:22:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-05-06 08:22:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:09,191 INFO L225 Difference]: With dead ends: 339 [2021-05-06 08:22:09,191 INFO L226 Difference]: Without dead ends: 339 [2021-05-06 08:22:09,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:09,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-06 08:22:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 296. [2021-05-06 08:22:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 203 states have (on average 1.3103448275862069) internal successors, (266), 211 states have internal predecessors, (266), 73 states have call successors, (73), 20 states have call predecessors, (73), 19 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 08:22:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 410 transitions. [2021-05-06 08:22:09,202 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 410 transitions. Word has length 46 [2021-05-06 08:22:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:09,202 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 410 transitions. [2021-05-06 08:22:09,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:22:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 410 transitions. [2021-05-06 08:22:09,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 08:22:09,203 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:09,203 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:09,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:22:09,417 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:09,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:09,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2021-05-06 08:22:09,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:09,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26688082] [2021-05-06 08:22:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:09,426 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:09,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297586721] [2021-05-06 08:22:09,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:09,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 08:22:09,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:09,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:22:09,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:09,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26688082] [2021-05-06 08:22:09,777 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:09,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297586721] [2021-05-06 08:22:09,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297586721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:09,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:09,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:09,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258198014] [2021-05-06 08:22:09,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:09,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:09,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:09,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:09,780 INFO L87 Difference]: Start difference. First operand 296 states and 410 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:10,214 INFO L93 Difference]: Finished difference Result 341 states and 478 transitions. [2021-05-06 08:22:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:10,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2021-05-06 08:22:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:10,216 INFO L225 Difference]: With dead ends: 341 [2021-05-06 08:22:10,216 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 08:22:10,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:10,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 08:22:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2021-05-06 08:22:10,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 225 states have (on average 1.3155555555555556) internal successors, (296), 235 states have internal predecessors, (296), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2021-05-06 08:22:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 472 transitions. [2021-05-06 08:22:10,229 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 472 transitions. Word has length 58 [2021-05-06 08:22:10,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:10,229 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 472 transitions. [2021-05-06 08:22:10,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:10,229 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 472 transitions. [2021-05-06 08:22:10,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 08:22:10,230 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:10,230 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:10,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:10,455 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:10,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash -80402644, now seen corresponding path program 1 times [2021-05-06 08:22:10,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:10,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336076924] [2021-05-06 08:22:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:10,463 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:10,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413063316] [2021-05-06 08:22:10,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:10,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:22:10,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:10,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:22:10,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:10,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336076924] [2021-05-06 08:22:10,672 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:10,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413063316] [2021-05-06 08:22:10,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413063316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:10,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:10,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:22:10,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61513060] [2021-05-06 08:22:10,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:10,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:10,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:10,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:10,673 INFO L87 Difference]: Start difference. First operand 336 states and 472 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:10,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:10,795 INFO L93 Difference]: Finished difference Result 399 states and 532 transitions. [2021-05-06 08:22:10,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:10,796 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2021-05-06 08:22:10,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:10,798 INFO L225 Difference]: With dead ends: 399 [2021-05-06 08:22:10,798 INFO L226 Difference]: Without dead ends: 399 [2021-05-06 08:22:10,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:10,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-06 08:22:10,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 385. [2021-05-06 08:22:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 261 states have (on average 1.2835249042145593) internal successors, (335), 269 states have internal predecessors, (335), 93 states have call successors, (93), 31 states have call predecessors, (93), 30 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2021-05-06 08:22:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 519 transitions. [2021-05-06 08:22:10,808 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 519 transitions. Word has length 63 [2021-05-06 08:22:10,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:10,809 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 519 transitions. [2021-05-06 08:22:10,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 519 transitions. [2021-05-06 08:22:10,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 08:22:10,810 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:10,810 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:11,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:11,025 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:11,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2021-05-06 08:22:11,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:11,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812493380] [2021-05-06 08:22:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:11,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:11,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101455627] [2021-05-06 08:22:11,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:11,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:22:11,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:11,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:22:11,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:11,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812493380] [2021-05-06 08:22:11,268 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:11,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101455627] [2021-05-06 08:22:11,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101455627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:11,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:11,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:22:11,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125816045] [2021-05-06 08:22:11,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:22:11,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:11,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:22:11,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:11,270 INFO L87 Difference]: Start difference. First operand 385 states and 519 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:11,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:11,407 INFO L93 Difference]: Finished difference Result 484 states and 635 transitions. [2021-05-06 08:22:11,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:22:11,407 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2021-05-06 08:22:11,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:11,409 INFO L225 Difference]: With dead ends: 484 [2021-05-06 08:22:11,409 INFO L226 Difference]: Without dead ends: 484 [2021-05-06 08:22:11,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:22:11,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-05-06 08:22:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 462. [2021-05-06 08:22:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 312 states have (on average 1.266025641025641) internal successors, (395), 325 states have internal predecessors, (395), 110 states have call successors, (110), 40 states have call predecessors, (110), 39 states have return successors, (107), 96 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 08:22:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 612 transitions. [2021-05-06 08:22:11,420 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 612 transitions. Word has length 64 [2021-05-06 08:22:11,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:11,421 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 612 transitions. [2021-05-06 08:22:11,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:11,421 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 612 transitions. [2021-05-06 08:22:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 08:22:11,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:11,422 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:11,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:22:11,645 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:11,645 INFO L82 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2021-05-06 08:22:11,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:11,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647959374] [2021-05-06 08:22:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:11,652 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:11,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072573042] [2021-05-06 08:22:11,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:11,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:22:11,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:11,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-06 08:22:11,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:11,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647959374] [2021-05-06 08:22:11,888 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:11,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072573042] [2021-05-06 08:22:11,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072573042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:11,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:11,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:22:11,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987693174] [2021-05-06 08:22:11,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:22:11,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:22:11,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:11,890 INFO L87 Difference]: Start difference. First operand 462 states and 612 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:22:12,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:12,074 INFO L93 Difference]: Finished difference Result 504 states and 662 transitions. [2021-05-06 08:22:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:22:12,075 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 67 [2021-05-06 08:22:12,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:12,078 INFO L225 Difference]: With dead ends: 504 [2021-05-06 08:22:12,078 INFO L226 Difference]: Without dead ends: 504 [2021-05-06 08:22:12,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:12,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-05-06 08:22:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 480. [2021-05-06 08:22:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 324 states have (on average 1.2592592592592593) internal successors, (408), 337 states have internal predecessors, (408), 113 states have call successors, (113), 43 states have call predecessors, (113), 42 states have return successors, (110), 99 states have call predecessors, (110), 110 states have call successors, (110) [2021-05-06 08:22:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 631 transitions. [2021-05-06 08:22:12,094 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 631 transitions. Word has length 67 [2021-05-06 08:22:12,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:12,094 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 631 transitions. [2021-05-06 08:22:12,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:22:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 631 transitions. [2021-05-06 08:22:12,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 08:22:12,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:12,095 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:12,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:22:12,309 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:12,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:12,309 INFO L82 PathProgramCache]: Analyzing trace with hash -28038179, now seen corresponding path program 2 times [2021-05-06 08:22:12,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:12,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098705515] [2021-05-06 08:22:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:12,315 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:12,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944819077] [2021-05-06 08:22:12,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:12,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:12,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:12,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:22:12,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:12,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:22:12,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:12,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098705515] [2021-05-06 08:22:12,490 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:12,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944819077] [2021-05-06 08:22:12,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944819077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:12,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:12,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:12,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838345311] [2021-05-06 08:22:12,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:12,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:12,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:12,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:12,491 INFO L87 Difference]: Start difference. First operand 480 states and 631 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:12,852 INFO L93 Difference]: Finished difference Result 816 states and 1192 transitions. [2021-05-06 08:22:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:22:12,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-05-06 08:22:12,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:12,856 INFO L225 Difference]: With dead ends: 816 [2021-05-06 08:22:12,856 INFO L226 Difference]: Without dead ends: 816 [2021-05-06 08:22:12,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:22:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-05-06 08:22:12,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 542. [2021-05-06 08:22:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 370 states have (on average 1.2837837837837838) internal successors, (475), 383 states have internal predecessors, (475), 129 states have call successors, (129), 43 states have call predecessors, (129), 42 states have return successors, (126), 115 states have call predecessors, (126), 126 states have call successors, (126) [2021-05-06 08:22:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 730 transitions. [2021-05-06 08:22:12,875 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 730 transitions. Word has length 65 [2021-05-06 08:22:12,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:12,876 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 730 transitions. [2021-05-06 08:22:12,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:12,876 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 730 transitions. [2021-05-06 08:22:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 08:22:12,877 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:12,877 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:13,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:13,100 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:13,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:13,100 INFO L82 PathProgramCache]: Analyzing trace with hash 695478703, now seen corresponding path program 1 times [2021-05-06 08:22:13,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:13,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566414465] [2021-05-06 08:22:13,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:13,106 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:13,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764938381] [2021-05-06 08:22:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:13,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:22:13,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:13,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:22:13,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:13,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566414465] [2021-05-06 08:22:13,296 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:13,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764938381] [2021-05-06 08:22:13,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764938381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:13,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:13,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:22:13,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482732532] [2021-05-06 08:22:13,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:13,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:13,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:13,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:13,297 INFO L87 Difference]: Start difference. First operand 542 states and 730 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:13,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:13,405 INFO L93 Difference]: Finished difference Result 544 states and 727 transitions. [2021-05-06 08:22:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:13,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-05-06 08:22:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:13,408 INFO L225 Difference]: With dead ends: 544 [2021-05-06 08:22:13,408 INFO L226 Difference]: Without dead ends: 544 [2021-05-06 08:22:13,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-05-06 08:22:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 542. [2021-05-06 08:22:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 370 states have (on average 1.272972972972973) internal successors, (471), 383 states have internal predecessors, (471), 129 states have call successors, (129), 43 states have call predecessors, (129), 42 states have return successors, (126), 115 states have call predecessors, (126), 126 states have call successors, (126) [2021-05-06 08:22:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 726 transitions. [2021-05-06 08:22:13,422 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 726 transitions. Word has length 65 [2021-05-06 08:22:13,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:13,423 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 726 transitions. [2021-05-06 08:22:13,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:13,423 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 726 transitions. [2021-05-06 08:22:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:22:13,424 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:13,424 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:13,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 08:22:13,637 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:13,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:13,638 INFO L82 PathProgramCache]: Analyzing trace with hash -609169376, now seen corresponding path program 1 times [2021-05-06 08:22:13,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:13,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430173245] [2021-05-06 08:22:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:13,647 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:13,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973757734] [2021-05-06 08:22:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:13,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 08:22:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:13,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-06 08:22:13,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:13,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430173245] [2021-05-06 08:22:13,841 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:13,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973757734] [2021-05-06 08:22:13,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973757734] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:13,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:13,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:13,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702180356] [2021-05-06 08:22:13,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:13,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:13,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:13,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:13,843 INFO L87 Difference]: Start difference. First operand 542 states and 726 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:13,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:13,883 INFO L93 Difference]: Finished difference Result 588 states and 787 transitions. [2021-05-06 08:22:13,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:13,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-05-06 08:22:13,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:13,886 INFO L225 Difference]: With dead ends: 588 [2021-05-06 08:22:13,886 INFO L226 Difference]: Without dead ends: 588 [2021-05-06 08:22:13,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-05-06 08:22:13,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 532. [2021-05-06 08:22:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 376 states have (on average 1.2845744680851063) internal successors, (483), 382 states have internal predecessors, (483), 117 states have call successors, (117), 39 states have call predecessors, (117), 38 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-06 08:22:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 714 transitions. [2021-05-06 08:22:13,904 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 714 transitions. Word has length 69 [2021-05-06 08:22:13,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:13,904 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 714 transitions. [2021-05-06 08:22:13,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:13,905 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 714 transitions. [2021-05-06 08:22:13,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:22:13,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:13,906 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:14,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:14,125 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:14,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:14,125 INFO L82 PathProgramCache]: Analyzing trace with hash -893000644, now seen corresponding path program 2 times [2021-05-06 08:22:14,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:14,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834988250] [2021-05-06 08:22:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:14,132 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:14,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822676202] [2021-05-06 08:22:14,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:14,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:14,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:14,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:22:14,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:14,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:22:14,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:14,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834988250] [2021-05-06 08:22:14,366 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:14,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822676202] [2021-05-06 08:22:14,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822676202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:14,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:14,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:22:14,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369710945] [2021-05-06 08:22:14,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:22:14,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:14,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:22:14,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:14,369 INFO L87 Difference]: Start difference. First operand 532 states and 714 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:14,514 INFO L93 Difference]: Finished difference Result 555 states and 735 transitions. [2021-05-06 08:22:14,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:22:14,515 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-05-06 08:22:14,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:14,517 INFO L225 Difference]: With dead ends: 555 [2021-05-06 08:22:14,517 INFO L226 Difference]: Without dead ends: 555 [2021-05-06 08:22:14,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:22:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-05-06 08:22:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2021-05-06 08:22:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 386 states have (on average 1.2772020725388602) internal successors, (493), 389 states have internal predecessors, (493), 118 states have call successors, (118), 40 states have call predecessors, (118), 39 states have return successors, (115), 114 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-06 08:22:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 726 transitions. [2021-05-06 08:22:14,530 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 726 transitions. Word has length 69 [2021-05-06 08:22:14,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:14,531 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 726 transitions. [2021-05-06 08:22:14,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 726 transitions. [2021-05-06 08:22:14,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 08:22:14,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:14,532 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:14,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:22:14,745 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:14,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1125561725, now seen corresponding path program 2 times [2021-05-06 08:22:14,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:14,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028482905] [2021-05-06 08:22:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:14,755 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:14,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141446719] [2021-05-06 08:22:14,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:14,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:14,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:14,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:22:14,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:14,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:22:14,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:14,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028482905] [2021-05-06 08:22:14,989 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:14,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141446719] [2021-05-06 08:22:14,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141446719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:14,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:14,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:14,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069878405] [2021-05-06 08:22:14,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:14,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:14,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:14,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:14,991 INFO L87 Difference]: Start difference. First operand 544 states and 726 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:15,143 INFO L93 Difference]: Finished difference Result 664 states and 855 transitions. [2021-05-06 08:22:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:15,143 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-05-06 08:22:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:15,146 INFO L225 Difference]: With dead ends: 664 [2021-05-06 08:22:15,146 INFO L226 Difference]: Without dead ends: 664 [2021-05-06 08:22:15,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:15,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-05-06 08:22:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 631. [2021-05-06 08:22:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 444 states have (on average 1.2545045045045045) internal successors, (557), 448 states have internal predecessors, (557), 135 states have call successors, (135), 52 states have call predecessors, (135), 51 states have return successors, (131), 130 states have call predecessors, (131), 131 states have call successors, (131) [2021-05-06 08:22:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 823 transitions. [2021-05-06 08:22:15,161 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 823 transitions. Word has length 70 [2021-05-06 08:22:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:15,162 INFO L480 AbstractCegarLoop]: Abstraction has 631 states and 823 transitions. [2021-05-06 08:22:15,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:15,162 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 823 transitions. [2021-05-06 08:22:15,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 08:22:15,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:15,163 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:15,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:22:15,377 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:15,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:15,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1343179262, now seen corresponding path program 1 times [2021-05-06 08:22:15,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:15,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645271387] [2021-05-06 08:22:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:15,383 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:15,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684716082] [2021-05-06 08:22:15,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:15,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:22:15,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:15,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 08:22:15,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:15,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645271387] [2021-05-06 08:22:15,595 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:15,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684716082] [2021-05-06 08:22:15,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684716082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:15,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:15,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:15,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843247153] [2021-05-06 08:22:15,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:15,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:15,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:15,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:15,597 INFO L87 Difference]: Start difference. First operand 631 states and 823 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:15,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:15,694 INFO L93 Difference]: Finished difference Result 722 states and 953 transitions. [2021-05-06 08:22:15,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:22:15,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-05-06 08:22:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:15,698 INFO L225 Difference]: With dead ends: 722 [2021-05-06 08:22:15,698 INFO L226 Difference]: Without dead ends: 722 [2021-05-06 08:22:15,699 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-05-06 08:22:15,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 715. [2021-05-06 08:22:15,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 519 states have (on average 1.2793834296724471) internal successors, (664), 528 states have internal predecessors, (664), 143 states have call successors, (143), 53 states have call predecessors, (143), 52 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-06 08:22:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 946 transitions. [2021-05-06 08:22:15,716 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 946 transitions. Word has length 70 [2021-05-06 08:22:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:15,716 INFO L480 AbstractCegarLoop]: Abstraction has 715 states and 946 transitions. [2021-05-06 08:22:15,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 946 transitions. [2021-05-06 08:22:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:22:15,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:15,717 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:15,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:22:15,938 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:15,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:15,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1695740300, now seen corresponding path program 1 times [2021-05-06 08:22:15,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:15,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314261577] [2021-05-06 08:22:15,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:15,959 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:15,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144722719] [2021-05-06 08:22:15,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:16,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:22:16,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:16,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-05-06 08:22:16,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:16,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314261577] [2021-05-06 08:22:16,230 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:16,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144722719] [2021-05-06 08:22:16,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144722719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:16,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:16,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:16,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912039614] [2021-05-06 08:22:16,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:16,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:16,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:16,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:16,232 INFO L87 Difference]: Start difference. First operand 715 states and 946 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:22:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:16,707 INFO L93 Difference]: Finished difference Result 942 states and 1295 transitions. [2021-05-06 08:22:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:22:16,708 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 74 [2021-05-06 08:22:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:16,711 INFO L225 Difference]: With dead ends: 942 [2021-05-06 08:22:16,711 INFO L226 Difference]: Without dead ends: 942 [2021-05-06 08:22:16,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:22:16,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-05-06 08:22:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 745. [2021-05-06 08:22:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 534 states have (on average 1.2771535580524345) internal successors, (682), 546 states have internal predecessors, (682), 155 states have call successors, (155), 56 states have call predecessors, (155), 55 states have return successors, (151), 142 states have call predecessors, (151), 151 states have call successors, (151) [2021-05-06 08:22:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 988 transitions. [2021-05-06 08:22:16,733 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 988 transitions. Word has length 74 [2021-05-06 08:22:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:16,733 INFO L480 AbstractCegarLoop]: Abstraction has 745 states and 988 transitions. [2021-05-06 08:22:16,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:22:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 988 transitions. [2021-05-06 08:22:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 08:22:16,734 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:16,734 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:16,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:22:16,949 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:16,949 INFO L82 PathProgramCache]: Analyzing trace with hash 589974765, now seen corresponding path program 2 times [2021-05-06 08:22:16,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:16,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655390328] [2021-05-06 08:22:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:16,959 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:16,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224507968] [2021-05-06 08:22:16,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:17,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:17,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:17,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:22:17,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:17,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 08:22:17,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:17,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655390328] [2021-05-06 08:22:17,178 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:17,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224507968] [2021-05-06 08:22:17,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224507968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:17,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:17,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:17,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083652164] [2021-05-06 08:22:17,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:17,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:17,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:17,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:17,179 INFO L87 Difference]: Start difference. First operand 745 states and 988 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:17,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:17,364 INFO L93 Difference]: Finished difference Result 913 states and 1248 transitions. [2021-05-06 08:22:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:17,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2021-05-06 08:22:17,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:17,368 INFO L225 Difference]: With dead ends: 913 [2021-05-06 08:22:17,368 INFO L226 Difference]: Without dead ends: 913 [2021-05-06 08:22:17,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:17,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-05-06 08:22:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 838. [2021-05-06 08:22:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 600 states have (on average 1.3033333333333332) internal successors, (782), 613 states have internal predecessors, (782), 180 states have call successors, (180), 58 states have call predecessors, (180), 57 states have return successors, (176), 166 states have call predecessors, (176), 176 states have call successors, (176) [2021-05-06 08:22:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1138 transitions. [2021-05-06 08:22:17,388 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1138 transitions. Word has length 73 [2021-05-06 08:22:17,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:17,388 INFO L480 AbstractCegarLoop]: Abstraction has 838 states and 1138 transitions. [2021-05-06 08:22:17,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:17,388 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1138 transitions. [2021-05-06 08:22:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:22:17,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:17,389 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:17,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:17,602 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:17,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 3 times [2021-05-06 08:22:17,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:17,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108035462] [2021-05-06 08:22:17,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:17,612 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:17,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534608426] [2021-05-06 08:22:17,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:17,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:22:17,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:17,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-06 08:22:17,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:17,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 08:22:18,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:18,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108035462] [2021-05-06 08:22:18,015 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:18,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534608426] [2021-05-06 08:22:18,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534608426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:18,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:18,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:18,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820162945] [2021-05-06 08:22:18,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:18,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:18,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:18,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:18,017 INFO L87 Difference]: Start difference. First operand 838 states and 1138 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:22:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:18,495 INFO L93 Difference]: Finished difference Result 920 states and 1253 transitions. [2021-05-06 08:22:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:22:18,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 75 [2021-05-06 08:22:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:18,499 INFO L225 Difference]: With dead ends: 920 [2021-05-06 08:22:18,499 INFO L226 Difference]: Without dead ends: 920 [2021-05-06 08:22:18,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-05-06 08:22:18,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 895. [2021-05-06 08:22:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 636 states have (on average 1.309748427672956) internal successors, (833), 650 states have internal predecessors, (833), 198 states have call successors, (198), 61 states have call predecessors, (198), 60 states have return successors, (194), 183 states have call predecessors, (194), 194 states have call successors, (194) [2021-05-06 08:22:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1225 transitions. [2021-05-06 08:22:18,532 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1225 transitions. Word has length 75 [2021-05-06 08:22:18,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:18,532 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1225 transitions. [2021-05-06 08:22:18,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:22:18,533 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1225 transitions. [2021-05-06 08:22:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 08:22:18,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:18,534 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:18,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:18,761 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:18,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:18,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1753783729, now seen corresponding path program 3 times [2021-05-06 08:22:18,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:18,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468068321] [2021-05-06 08:22:18,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:18,767 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:18,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103046096] [2021-05-06 08:22:18,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:18,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:22:18,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:18,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:22:18,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:18,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:22:19,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:19,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468068321] [2021-05-06 08:22:19,052 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:19,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103046096] [2021-05-06 08:22:19,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103046096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:19,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:19,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:19,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751201705] [2021-05-06 08:22:19,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:19,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:19,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:19,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:19,054 INFO L87 Difference]: Start difference. First operand 895 states and 1225 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:19,278 INFO L93 Difference]: Finished difference Result 1075 states and 1426 transitions. [2021-05-06 08:22:19,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:22:19,279 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2021-05-06 08:22:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:19,283 INFO L225 Difference]: With dead ends: 1075 [2021-05-06 08:22:19,283 INFO L226 Difference]: Without dead ends: 1075 [2021-05-06 08:22:19,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:19,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-05-06 08:22:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1045. [2021-05-06 08:22:19,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 740 states have (on average 1.2797297297297296) internal successors, (947), 755 states have internal predecessors, (947), 229 states have call successors, (229), 76 states have call predecessors, (229), 75 states have return successors, (224), 213 states have call predecessors, (224), 224 states have call successors, (224) [2021-05-06 08:22:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1400 transitions. [2021-05-06 08:22:19,307 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1400 transitions. Word has length 76 [2021-05-06 08:22:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:19,308 INFO L480 AbstractCegarLoop]: Abstraction has 1045 states and 1400 transitions. [2021-05-06 08:22:19,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:19,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1400 transitions. [2021-05-06 08:22:19,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 08:22:19,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:19,309 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:19,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:19,526 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:19,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:19,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1747863324, now seen corresponding path program 1 times [2021-05-06 08:22:19,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:19,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048371980] [2021-05-06 08:22:19,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:19,533 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:19,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2147089266] [2021-05-06 08:22:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:19,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-06 08:22:19,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:19,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-06 08:22:19,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:19,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048371980] [2021-05-06 08:22:19,899 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:19,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147089266] [2021-05-06 08:22:19,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147089266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:19,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:19,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:19,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636296670] [2021-05-06 08:22:19,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:19,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:19,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:19,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:19,901 INFO L87 Difference]: Start difference. First operand 1045 states and 1400 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:22:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:20,426 INFO L93 Difference]: Finished difference Result 1119 states and 1497 transitions. [2021-05-06 08:22:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:22:20,427 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2021-05-06 08:22:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:20,430 INFO L225 Difference]: With dead ends: 1119 [2021-05-06 08:22:20,431 INFO L226 Difference]: Without dead ends: 1118 [2021-05-06 08:22:20,431 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 246.3ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-05-06 08:22:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1053. [2021-05-06 08:22:20,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 747 states have (on average 1.2757697456492638) internal successors, (953), 761 states have internal predecessors, (953), 227 states have call successors, (227), 79 states have call predecessors, (227), 78 states have return successors, (223), 212 states have call predecessors, (223), 223 states have call successors, (223) [2021-05-06 08:22:20,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1403 transitions. [2021-05-06 08:22:20,453 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1403 transitions. Word has length 81 [2021-05-06 08:22:20,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:20,453 INFO L480 AbstractCegarLoop]: Abstraction has 1053 states and 1403 transitions. [2021-05-06 08:22:20,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:22:20,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1403 transitions. [2021-05-06 08:22:20,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:22:20,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:20,455 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:20,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-06 08:22:20,669 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:20,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:20,669 INFO L82 PathProgramCache]: Analyzing trace with hash 572886209, now seen corresponding path program 1 times [2021-05-06 08:22:20,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:20,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633531226] [2021-05-06 08:22:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:20,675 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:20,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966066747] [2021-05-06 08:22:20,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:20,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:22:20,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:20,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:22:20,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:20,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633531226] [2021-05-06 08:22:20,936 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:20,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966066747] [2021-05-06 08:22:20,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966066747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:20,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:20,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:20,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670172749] [2021-05-06 08:22:20,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:20,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:20,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:20,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:20,937 INFO L87 Difference]: Start difference. First operand 1053 states and 1403 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:21,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:21,122 INFO L93 Difference]: Finished difference Result 1059 states and 1404 transitions. [2021-05-06 08:22:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:21,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-06 08:22:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:21,126 INFO L225 Difference]: With dead ends: 1059 [2021-05-06 08:22:21,126 INFO L226 Difference]: Without dead ends: 1059 [2021-05-06 08:22:21,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:21,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-05-06 08:22:21,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1053. [2021-05-06 08:22:21,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 747 states have (on average 1.2730923694779117) internal successors, (951), 761 states have internal predecessors, (951), 227 states have call successors, (227), 79 states have call predecessors, (227), 78 states have return successors, (223), 212 states have call predecessors, (223), 223 states have call successors, (223) [2021-05-06 08:22:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1401 transitions. [2021-05-06 08:22:21,147 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1401 transitions. Word has length 87 [2021-05-06 08:22:21,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:21,147 INFO L480 AbstractCegarLoop]: Abstraction has 1053 states and 1401 transitions. [2021-05-06 08:22:21,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1401 transitions. [2021-05-06 08:22:21,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:22:21,148 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:21,149 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:21,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:21,365 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2091636203, now seen corresponding path program 2 times [2021-05-06 08:22:21,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:21,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746583063] [2021-05-06 08:22:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:21,373 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:21,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465664989] [2021-05-06 08:22:21,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:21,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:21,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:21,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:22:21,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:21,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 08:22:21,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:21,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746583063] [2021-05-06 08:22:21,600 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:21,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465664989] [2021-05-06 08:22:21,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465664989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:21,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:21,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:22:21,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975618990] [2021-05-06 08:22:21,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:22:21,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:21,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:22:21,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:21,602 INFO L87 Difference]: Start difference. First operand 1053 states and 1401 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:22:21,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:21,731 INFO L93 Difference]: Finished difference Result 1318 states and 1830 transitions. [2021-05-06 08:22:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:22:21,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 90 [2021-05-06 08:22:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:21,736 INFO L225 Difference]: With dead ends: 1318 [2021-05-06 08:22:21,736 INFO L226 Difference]: Without dead ends: 1318 [2021-05-06 08:22:21,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:21,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-05-06 08:22:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1198. [2021-05-06 08:22:21,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 808 states have (on average 1.2896039603960396) internal successors, (1042), 830 states have internal predecessors, (1042), 308 states have call successors, (308), 82 states have call predecessors, (308), 81 states have return successors, (304), 285 states have call predecessors, (304), 304 states have call successors, (304) [2021-05-06 08:22:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1654 transitions. [2021-05-06 08:22:21,763 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1654 transitions. Word has length 90 [2021-05-06 08:22:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:21,763 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 1654 transitions. [2021-05-06 08:22:21,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:22:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1654 transitions. [2021-05-06 08:22:21,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 08:22:21,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:21,765 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:21,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 08:22:21,981 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:21,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:21,981 INFO L82 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 2 times [2021-05-06 08:22:21,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:21,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025911523] [2021-05-06 08:22:21,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:21,987 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:21,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585352005] [2021-05-06 08:22:21,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:22,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:22,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:22,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-06 08:22:22,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:22,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-05-06 08:22:22,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:22,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025911523] [2021-05-06 08:22:22,592 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:22,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585352005] [2021-05-06 08:22:22,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585352005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:22,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:22,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:22:22,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562141100] [2021-05-06 08:22:22,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:22:22,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:22,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:22:22,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:22,594 INFO L87 Difference]: Start difference. First operand 1198 states and 1654 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:23,396 INFO L93 Difference]: Finished difference Result 1344 states and 1878 transitions. [2021-05-06 08:22:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:22:23,396 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2021-05-06 08:22:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:23,401 INFO L225 Difference]: With dead ends: 1344 [2021-05-06 08:22:23,401 INFO L226 Difference]: Without dead ends: 1343 [2021-05-06 08:22:23,403 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 482.8ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:22:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-05-06 08:22:23,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1301. [2021-05-06 08:22:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 862 states have (on average 1.3004640371229699) internal successors, (1121), 888 states have internal predecessors, (1121), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 08:22:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1825 transitions. [2021-05-06 08:22:23,429 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1825 transitions. Word has length 88 [2021-05-06 08:22:23,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:23,430 INFO L480 AbstractCegarLoop]: Abstraction has 1301 states and 1825 transitions. [2021-05-06 08:22:23,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1825 transitions. [2021-05-06 08:22:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:22:23,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:23,432 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:23,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:23,646 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:23,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:23,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1734422414, now seen corresponding path program 2 times [2021-05-06 08:22:23,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:23,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332160900] [2021-05-06 08:22:23,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:23,653 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:23,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097547134] [2021-05-06 08:22:23,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:23,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:23,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:23,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:22:23,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:23,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:22:23,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:23,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332160900] [2021-05-06 08:22:23,921 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:23,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097547134] [2021-05-06 08:22:23,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097547134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:23,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:23,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:23,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356983641] [2021-05-06 08:22:23,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:23,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:23,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:23,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:23,924 INFO L87 Difference]: Start difference. First operand 1301 states and 1825 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:24,110 INFO L93 Difference]: Finished difference Result 1331 states and 1852 transitions. [2021-05-06 08:22:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:22:24,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2021-05-06 08:22:24,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:24,118 INFO L225 Difference]: With dead ends: 1331 [2021-05-06 08:22:24,118 INFO L226 Difference]: Without dead ends: 1331 [2021-05-06 08:22:24,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-05-06 08:22:24,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1312. [2021-05-06 08:22:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 873 states have (on average 1.2966781214203895) internal successors, (1132), 899 states have internal predecessors, (1132), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 08:22:24,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1836 transitions. [2021-05-06 08:22:24,145 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1836 transitions. Word has length 91 [2021-05-06 08:22:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:24,146 INFO L480 AbstractCegarLoop]: Abstraction has 1312 states and 1836 transitions. [2021-05-06 08:22:24,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:24,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1836 transitions. [2021-05-06 08:22:24,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 08:22:24,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:24,147 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:24,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 08:22:24,369 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:24,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:24,369 INFO L82 PathProgramCache]: Analyzing trace with hash 292128969, now seen corresponding path program 1 times [2021-05-06 08:22:24,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:24,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669370664] [2021-05-06 08:22:24,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:24,375 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:24,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431634058] [2021-05-06 08:22:24,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:24,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:22:24,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:24,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:22:24,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:24,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669370664] [2021-05-06 08:22:24,663 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:24,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431634058] [2021-05-06 08:22:24,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431634058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:24,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:24,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:24,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263779180] [2021-05-06 08:22:24,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:24,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:24,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:24,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:24,665 INFO L87 Difference]: Start difference. First operand 1312 states and 1836 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:24,880 INFO L93 Difference]: Finished difference Result 1338 states and 1858 transitions. [2021-05-06 08:22:24,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:22:24,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2021-05-06 08:22:24,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:24,886 INFO L225 Difference]: With dead ends: 1338 [2021-05-06 08:22:24,886 INFO L226 Difference]: Without dead ends: 1338 [2021-05-06 08:22:24,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:24,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-05-06 08:22:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1332. [2021-05-06 08:22:24,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 893 states have (on average 1.2889137737961927) internal successors, (1151), 919 states have internal predecessors, (1151), 354 states have call successors, (354), 85 states have call predecessors, (354), 84 states have return successors, (350), 327 states have call predecessors, (350), 350 states have call successors, (350) [2021-05-06 08:22:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1855 transitions. [2021-05-06 08:22:24,916 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1855 transitions. Word has length 93 [2021-05-06 08:22:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:24,916 INFO L480 AbstractCegarLoop]: Abstraction has 1332 states and 1855 transitions. [2021-05-06 08:22:24,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1855 transitions. [2021-05-06 08:22:24,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:22:24,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:24,918 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:25,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 08:22:25,143 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:25,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:25,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2096647522, now seen corresponding path program 3 times [2021-05-06 08:22:25,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:25,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620176815] [2021-05-06 08:22:25,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:25,150 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:25,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545489655] [2021-05-06 08:22:25,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:25,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:22:25,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:25,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:22:25,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:25,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:22:25,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:25,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620176815] [2021-05-06 08:22:25,469 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:25,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545489655] [2021-05-06 08:22:25,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545489655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:25,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:25,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:25,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898787613] [2021-05-06 08:22:25,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:25,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:25,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:25,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:25,471 INFO L87 Difference]: Start difference. First operand 1332 states and 1855 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:25,755 INFO L93 Difference]: Finished difference Result 1511 states and 2057 transitions. [2021-05-06 08:22:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:22:25,756 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2021-05-06 08:22:25,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:25,762 INFO L225 Difference]: With dead ends: 1511 [2021-05-06 08:22:25,762 INFO L226 Difference]: Without dead ends: 1511 [2021-05-06 08:22:25,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:25,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-05-06 08:22:25,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1454. [2021-05-06 08:22:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 963 states have (on average 1.2793354101765317) internal successors, (1232), 990 states have internal predecessors, (1232), 387 states have call successors, (387), 104 states have call predecessors, (387), 103 states have return successors, (382), 359 states have call predecessors, (382), 382 states have call successors, (382) [2021-05-06 08:22:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 2001 transitions. [2021-05-06 08:22:25,838 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 2001 transitions. Word has length 97 [2021-05-06 08:22:25,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:25,838 INFO L480 AbstractCegarLoop]: Abstraction has 1454 states and 2001 transitions. [2021-05-06 08:22:25,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 2001 transitions. [2021-05-06 08:22:25,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 08:22:25,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:25,841 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:26,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 08:22:26,055 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:26,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:26,055 INFO L82 PathProgramCache]: Analyzing trace with hash 672019267, now seen corresponding path program 3 times [2021-05-06 08:22:26,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:26,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384319462] [2021-05-06 08:22:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:26,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:26,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667935756] [2021-05-06 08:22:26,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:26,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:22:26,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:26,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:22:26,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:26,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 120 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:22:26,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:26,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384319462] [2021-05-06 08:22:26,435 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:26,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667935756] [2021-05-06 08:22:26,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667935756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:26,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:26,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:22:26,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735228207] [2021-05-06 08:22:26,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:22:26,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:26,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:22:26,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:22:26,437 INFO L87 Difference]: Start difference. First operand 1454 states and 2001 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:26,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:26,721 INFO L93 Difference]: Finished difference Result 1737 states and 2340 transitions. [2021-05-06 08:22:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 08:22:26,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 98 [2021-05-06 08:22:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:26,732 INFO L225 Difference]: With dead ends: 1737 [2021-05-06 08:22:26,732 INFO L226 Difference]: Without dead ends: 1737 [2021-05-06 08:22:26,732 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:22:26,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-05-06 08:22:26,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1654. [2021-05-06 08:22:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1097 states have (on average 1.2652689152233363) internal successors, (1388), 1137 states have internal predecessors, (1388), 434 states have call successors, (434), 123 states have call predecessors, (434), 122 states have return successors, (428), 393 states have call predecessors, (428), 428 states have call successors, (428) [2021-05-06 08:22:26,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2250 transitions. [2021-05-06 08:22:26,764 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2250 transitions. Word has length 98 [2021-05-06 08:22:26,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:26,764 INFO L480 AbstractCegarLoop]: Abstraction has 1654 states and 2250 transitions. [2021-05-06 08:22:26,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:26,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2250 transitions. [2021-05-06 08:22:26,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 08:22:26,766 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:26,767 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:26,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 08:22:26,989 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:26,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:26,989 INFO L82 PathProgramCache]: Analyzing trace with hash 114401441, now seen corresponding path program 1 times [2021-05-06 08:22:26,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:26,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193230218] [2021-05-06 08:22:26,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:26,996 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:26,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469148700] [2021-05-06 08:22:26,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:27,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:22:27,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:27,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 103 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:22:27,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:27,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193230218] [2021-05-06 08:22:27,280 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:27,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469148700] [2021-05-06 08:22:27,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469148700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:27,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:27,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:27,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931641257] [2021-05-06 08:22:27,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:27,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:27,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:27,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:27,281 INFO L87 Difference]: Start difference. First operand 1654 states and 2250 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:27,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:27,542 INFO L93 Difference]: Finished difference Result 1656 states and 2225 transitions. [2021-05-06 08:22:27,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:22:27,543 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 99 [2021-05-06 08:22:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:27,549 INFO L225 Difference]: With dead ends: 1656 [2021-05-06 08:22:27,549 INFO L226 Difference]: Without dead ends: 1656 [2021-05-06 08:22:27,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:27,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-05-06 08:22:27,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1631. [2021-05-06 08:22:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1081 states have (on average 1.247918593894542) internal successors, (1349), 1120 states have internal predecessors, (1349), 428 states have call successors, (428), 122 states have call predecessors, (428), 121 states have return successors, (422), 388 states have call predecessors, (422), 422 states have call successors, (422) [2021-05-06 08:22:27,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2199 transitions. [2021-05-06 08:22:27,581 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2199 transitions. Word has length 99 [2021-05-06 08:22:27,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:27,581 INFO L480 AbstractCegarLoop]: Abstraction has 1631 states and 2199 transitions. [2021-05-06 08:22:27,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:27,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2199 transitions. [2021-05-06 08:22:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:22:27,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:27,583 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:27,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:27,808 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:27,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1944004338, now seen corresponding path program 3 times [2021-05-06 08:22:27,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:27,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520206647] [2021-05-06 08:22:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:27,814 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:27,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931922944] [2021-05-06 08:22:27,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:27,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:22:27,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:27,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 08:22:27,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:28,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 70 proven. 7 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-05-06 08:22:28,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:28,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520206647] [2021-05-06 08:22:28,251 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:28,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931922944] [2021-05-06 08:22:28,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931922944] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:28,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:28,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:28,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273788070] [2021-05-06 08:22:28,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:28,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:28,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:28,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:28,253 INFO L87 Difference]: Start difference. First operand 1631 states and 2199 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:22:29,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:29,099 INFO L93 Difference]: Finished difference Result 1965 states and 2682 transitions. [2021-05-06 08:22:29,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:22:29,100 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 104 [2021-05-06 08:22:29,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:29,108 INFO L225 Difference]: With dead ends: 1965 [2021-05-06 08:22:29,109 INFO L226 Difference]: Without dead ends: 1960 [2021-05-06 08:22:29,109 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 254.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:29,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-05-06 08:22:29,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1872. [2021-05-06 08:22:29,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1231 states have (on average 1.2518277822908204) internal successors, (1541), 1276 states have internal predecessors, (1541), 507 states have call successors, (507), 134 states have call predecessors, (507), 133 states have return successors, (502), 461 states have call predecessors, (502), 502 states have call successors, (502) [2021-05-06 08:22:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2550 transitions. [2021-05-06 08:22:29,149 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2550 transitions. Word has length 104 [2021-05-06 08:22:29,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:29,149 INFO L480 AbstractCegarLoop]: Abstraction has 1872 states and 2550 transitions. [2021-05-06 08:22:29,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:22:29,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2550 transitions. [2021-05-06 08:22:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 08:22:29,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:29,151 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:29,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-06 08:22:29,375 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:29,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:29,375 INFO L82 PathProgramCache]: Analyzing trace with hash -840847847, now seen corresponding path program 4 times [2021-05-06 08:22:29,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:29,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449723165] [2021-05-06 08:22:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:29,385 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:29,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081701834] [2021-05-06 08:22:29,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:29,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:29,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:29,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-06 08:22:29,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:29,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 30 proven. 101 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 08:22:30,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:30,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449723165] [2021-05-06 08:22:30,680 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:30,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081701834] [2021-05-06 08:22:30,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081701834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:30,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:30,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 08:22:30,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346535933] [2021-05-06 08:22:30,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 08:22:30,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:30,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 08:22:30,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:22:30,683 INFO L87 Difference]: Start difference. First operand 1872 states and 2550 transitions. Second operand has 23 states, 22 states have (on average 2.5) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-06 08:22:31,642 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-06 08:22:32,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:32,088 INFO L93 Difference]: Finished difference Result 2055 states and 2812 transitions. [2021-05-06 08:22:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:22:32,088 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 102 [2021-05-06 08:22:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:32,095 INFO L225 Difference]: With dead ends: 2055 [2021-05-06 08:22:32,095 INFO L226 Difference]: Without dead ends: 2055 [2021-05-06 08:22:32,096 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1368.2ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-05-06 08:22:32,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-05-06 08:22:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 2031. [2021-05-06 08:22:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1325 states have (on average 1.2588679245283019) internal successors, (1668), 1374 states have internal predecessors, (1668), 561 states have call successors, (561), 145 states have call predecessors, (561), 144 states have return successors, (556), 511 states have call predecessors, (556), 556 states have call successors, (556) [2021-05-06 08:22:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2785 transitions. [2021-05-06 08:22:32,132 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2785 transitions. Word has length 102 [2021-05-06 08:22:32,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:32,132 INFO L480 AbstractCegarLoop]: Abstraction has 2031 states and 2785 transitions. [2021-05-06 08:22:32,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-06 08:22:32,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2785 transitions. [2021-05-06 08:22:32,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 08:22:32,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:32,134 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:32,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:32,349 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:32,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:32,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1448058698, now seen corresponding path program 4 times [2021-05-06 08:22:32,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:32,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447093582] [2021-05-06 08:22:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:32,356 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:32,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778403676] [2021-05-06 08:22:32,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:32,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:32,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:32,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:22:32,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:32,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:22:32,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:32,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447093582] [2021-05-06 08:22:32,715 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:32,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778403676] [2021-05-06 08:22:32,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778403676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:32,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:32,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:22:32,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374951834] [2021-05-06 08:22:32,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:22:32,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:32,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:22:32,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:22:32,717 INFO L87 Difference]: Start difference. First operand 2031 states and 2785 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:33,043 INFO L93 Difference]: Finished difference Result 2143 states and 2902 transitions. [2021-05-06 08:22:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 08:22:33,044 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 103 [2021-05-06 08:22:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:33,050 INFO L225 Difference]: With dead ends: 2143 [2021-05-06 08:22:33,050 INFO L226 Difference]: Without dead ends: 2143 [2021-05-06 08:22:33,050 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:22:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-05-06 08:22:33,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 2098. [2021-05-06 08:22:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 1388 states have (on average 1.2528818443804035) internal successors, (1739), 1420 states have internal predecessors, (1739), 563 states have call successors, (563), 147 states have call predecessors, (563), 146 states have return successors, (558), 530 states have call predecessors, (558), 558 states have call successors, (558) [2021-05-06 08:22:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2860 transitions. [2021-05-06 08:22:33,087 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2860 transitions. Word has length 103 [2021-05-06 08:22:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:33,087 INFO L480 AbstractCegarLoop]: Abstraction has 2098 states and 2860 transitions. [2021-05-06 08:22:33,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2860 transitions. [2021-05-06 08:22:33,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:22:33,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:33,089 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:33,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:33,305 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:33,305 INFO L82 PathProgramCache]: Analyzing trace with hash 816301515, now seen corresponding path program 4 times [2021-05-06 08:22:33,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:33,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108785031] [2021-05-06 08:22:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:33,310 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:33,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486417382] [2021-05-06 08:22:33,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:33,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:33,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:33,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:22:33,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:33,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 27 proven. 133 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:22:33,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:33,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108785031] [2021-05-06 08:22:33,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:33,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486417382] [2021-05-06 08:22:33,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486417382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:33,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:33,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:22:33,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115090800] [2021-05-06 08:22:33,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:22:33,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:33,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:22:33,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:33,674 INFO L87 Difference]: Start difference. First operand 2098 states and 2860 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:34,010 INFO L93 Difference]: Finished difference Result 2506 states and 3367 transitions. [2021-05-06 08:22:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 08:22:34,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 104 [2021-05-06 08:22:34,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:34,020 INFO L225 Difference]: With dead ends: 2506 [2021-05-06 08:22:34,020 INFO L226 Difference]: Without dead ends: 2506 [2021-05-06 08:22:34,020 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:22:34,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-05-06 08:22:34,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2373. [2021-05-06 08:22:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 1538 states have (on average 1.2451235370611184) internal successors, (1915), 1571 states have internal predecessors, (1915), 660 states have call successors, (660), 175 states have call predecessors, (660), 174 states have return successors, (654), 626 states have call predecessors, (654), 654 states have call successors, (654) [2021-05-06 08:22:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 3229 transitions. [2021-05-06 08:22:34,068 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 3229 transitions. Word has length 104 [2021-05-06 08:22:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:34,068 INFO L480 AbstractCegarLoop]: Abstraction has 2373 states and 3229 transitions. [2021-05-06 08:22:34,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 3229 transitions. [2021-05-06 08:22:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 08:22:34,070 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:34,070 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:34,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-06 08:22:34,277 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:34,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:34,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2067527905, now seen corresponding path program 4 times [2021-05-06 08:22:34,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:34,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327288942] [2021-05-06 08:22:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:34,283 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:34,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344371970] [2021-05-06 08:22:34,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:34,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:34,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:34,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 08:22:34,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:34,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 46 proven. 72 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-05-06 08:22:34,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:34,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327288942] [2021-05-06 08:22:34,991 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:34,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344371970] [2021-05-06 08:22:34,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344371970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:34,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:34,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:34,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641076281] [2021-05-06 08:22:34,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:34,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:34,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:34,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:34,993 INFO L87 Difference]: Start difference. First operand 2373 states and 3229 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:22:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:35,674 INFO L93 Difference]: Finished difference Result 2361 states and 3206 transitions. [2021-05-06 08:22:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 108 [2021-05-06 08:22:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:35,682 INFO L225 Difference]: With dead ends: 2361 [2021-05-06 08:22:35,682 INFO L226 Difference]: Without dead ends: 2356 [2021-05-06 08:22:35,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:22:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-05-06 08:22:35,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2345. [2021-05-06 08:22:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 1524 states have (on average 1.246719160104987) internal successors, (1900), 1558 states have internal predecessors, (1900), 647 states have call successors, (647), 174 states have call predecessors, (647), 173 states have return successors, (642), 612 states have call predecessors, (642), 642 states have call successors, (642) [2021-05-06 08:22:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 3189 transitions. [2021-05-06 08:22:35,729 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 3189 transitions. Word has length 108 [2021-05-06 08:22:35,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:35,729 INFO L480 AbstractCegarLoop]: Abstraction has 2345 states and 3189 transitions. [2021-05-06 08:22:35,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:22:35,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 3189 transitions. [2021-05-06 08:22:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:22:35,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:35,732 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:35,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 08:22:35,941 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:35,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:35,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1065259357, now seen corresponding path program 5 times [2021-05-06 08:22:35,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:35,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096438832] [2021-05-06 08:22:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:35,947 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:35,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899692316] [2021-05-06 08:22:35,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:36,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:22:36,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:36,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-06 08:22:36,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:36,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:36,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,303 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-05-06 08:22:37,635 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-06 08:22:37,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:37,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:38,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 71 proven. 89 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-05-06 08:22:39,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:39,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096438832] [2021-05-06 08:22:39,258 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:39,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899692316] [2021-05-06 08:22:39,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899692316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:39,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:39,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:22:39,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156881222] [2021-05-06 08:22:39,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:22:39,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:39,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:22:39,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:39,260 INFO L87 Difference]: Start difference. First operand 2345 states and 3189 transitions. Second operand has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:22:42,425 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-05-06 08:22:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:44,519 INFO L93 Difference]: Finished difference Result 2491 states and 3385 transitions. [2021-05-06 08:22:44,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:22:44,520 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 111 [2021-05-06 08:22:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:44,525 INFO L225 Difference]: With dead ends: 2491 [2021-05-06 08:22:44,525 INFO L226 Difference]: Without dead ends: 2490 [2021-05-06 08:22:44,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2933.8ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:22:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-05-06 08:22:44,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2385. [2021-05-06 08:22:44,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 1553 states have (on average 1.2421120412105602) internal successors, (1929), 1588 states have internal predecessors, (1929), 649 states have call successors, (649), 183 states have call predecessors, (649), 182 states have return successors, (644), 613 states have call predecessors, (644), 644 states have call successors, (644) [2021-05-06 08:22:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 3222 transitions. [2021-05-06 08:22:44,598 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 3222 transitions. Word has length 111 [2021-05-06 08:22:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:44,598 INFO L480 AbstractCegarLoop]: Abstraction has 2385 states and 3222 transitions. [2021-05-06 08:22:44,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:22:44,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 3222 transitions. [2021-05-06 08:22:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 08:22:44,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:44,601 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:44,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 08:22:44,825 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:44,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:44,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1419687748, now seen corresponding path program 5 times [2021-05-06 08:22:44,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:44,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113770672] [2021-05-06 08:22:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:44,832 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:44,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670018114] [2021-05-06 08:22:44,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:45,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:22:45,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:45,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-06 08:22:45,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:45,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,654 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-06 08:22:45,779 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-06 08:22:45,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 32 proven. 92 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-05-06 08:22:45,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:45,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113770672] [2021-05-06 08:22:45,920 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:45,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670018114] [2021-05-06 08:22:45,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670018114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:45,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:45,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:22:45,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434629070] [2021-05-06 08:22:45,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:22:45,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:45,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:22:45,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:45,922 INFO L87 Difference]: Start difference. First operand 2385 states and 3222 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:22:46,816 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-06 08:22:47,118 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-06 08:22:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:47,377 INFO L93 Difference]: Finished difference Result 2551 states and 3450 transitions. [2021-05-06 08:22:47,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:22:47,377 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 109 [2021-05-06 08:22:47,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:47,381 INFO L225 Difference]: With dead ends: 2551 [2021-05-06 08:22:47,381 INFO L226 Difference]: Without dead ends: 2551 [2021-05-06 08:22:47,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1408.7ms TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-05-06 08:22:47,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-05-06 08:22:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2494. [2021-05-06 08:22:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 1621 states have (on average 1.2449105490438002) internal successors, (2018), 1659 states have internal predecessors, (2018), 683 states have call successors, (683), 190 states have call predecessors, (683), 189 states have return successors, (678), 644 states have call predecessors, (678), 678 states have call successors, (678) [2021-05-06 08:22:47,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3379 transitions. [2021-05-06 08:22:47,426 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3379 transitions. Word has length 109 [2021-05-06 08:22:47,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:47,427 INFO L480 AbstractCegarLoop]: Abstraction has 2494 states and 3379 transitions. [2021-05-06 08:22:47,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:22:47,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3379 transitions. [2021-05-06 08:22:47,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 08:22:47,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:47,428 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:47,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:47,636 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:47,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1489781889, now seen corresponding path program 5 times [2021-05-06 08:22:47,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:47,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624245987] [2021-05-06 08:22:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:47,642 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:47,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497080526] [2021-05-06 08:22:47,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:47,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:22:47,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:47,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:22:47,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:47,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:47,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 41 proven. 142 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:22:48,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:48,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624245987] [2021-05-06 08:22:48,054 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:48,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497080526] [2021-05-06 08:22:48,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497080526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:48,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:48,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:22:48,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104260942] [2021-05-06 08:22:48,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:22:48,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:48,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:22:48,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:48,055 INFO L87 Difference]: Start difference. First operand 2494 states and 3379 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:48,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:48,436 INFO L93 Difference]: Finished difference Result 3065 states and 4075 transitions. [2021-05-06 08:22:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 08:22:48,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 110 [2021-05-06 08:22:48,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:48,444 INFO L225 Difference]: With dead ends: 3065 [2021-05-06 08:22:48,444 INFO L226 Difference]: Without dead ends: 3065 [2021-05-06 08:22:48,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:22:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2021-05-06 08:22:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 2949. [2021-05-06 08:22:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 1946 states have (on average 1.2204522096608428) internal successors, (2375), 1984 states have internal predecessors, (2375), 782 states have call successors, (782), 221 states have call predecessors, (782), 220 states have return successors, (776), 743 states have call predecessors, (776), 776 states have call successors, (776) [2021-05-06 08:22:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 3933 transitions. [2021-05-06 08:22:48,506 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 3933 transitions. Word has length 110 [2021-05-06 08:22:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:48,507 INFO L480 AbstractCegarLoop]: Abstraction has 2949 states and 3933 transitions. [2021-05-06 08:22:48,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:22:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 3933 transitions. [2021-05-06 08:22:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 08:22:48,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:48,509 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:48,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-06 08:22:48,736 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:48,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:48,736 INFO L82 PathProgramCache]: Analyzing trace with hash 989476300, now seen corresponding path program 6 times [2021-05-06 08:22:48,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:48,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604094684] [2021-05-06 08:22:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:48,742 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:48,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867060783] [2021-05-06 08:22:48,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:48,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-06 08:22:48,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:48,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-06 08:22:48,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:49,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 78 proven. 77 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-06 08:22:49,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:49,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604094684] [2021-05-06 08:22:49,633 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:49,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867060783] [2021-05-06 08:22:49,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867060783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:49,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:49,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:22:49,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509558695] [2021-05-06 08:22:49,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:22:49,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:49,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:22:49,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:49,634 INFO L87 Difference]: Start difference. First operand 2949 states and 3933 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:22:50,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:50,462 INFO L93 Difference]: Finished difference Result 3033 states and 4055 transitions. [2021-05-06 08:22:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:22:50,463 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 115 [2021-05-06 08:22:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:50,470 INFO L225 Difference]: With dead ends: 3033 [2021-05-06 08:22:50,471 INFO L226 Difference]: Without dead ends: 3028 [2021-05-06 08:22:50,471 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 639.2ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:22:50,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-05-06 08:22:50,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 3005. [2021-05-06 08:22:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3005 states, 1977 states have (on average 1.2230652503793626) internal successors, (2418), 2016 states have internal predecessors, (2418), 806 states have call successors, (806), 222 states have call predecessors, (806), 221 states have return successors, (800), 766 states have call predecessors, (800), 800 states have call successors, (800) [2021-05-06 08:22:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 4024 transitions. [2021-05-06 08:22:50,532 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 4024 transitions. Word has length 115 [2021-05-06 08:22:50,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:50,532 INFO L480 AbstractCegarLoop]: Abstraction has 3005 states and 4024 transitions. [2021-05-06 08:22:50,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:22:50,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 4024 transitions. [2021-05-06 08:22:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 08:22:50,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:50,534 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:50,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-06 08:22:50,760 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:50,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:50,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1356735190, now seen corresponding path program 7 times [2021-05-06 08:22:50,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:50,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311954515] [2021-05-06 08:22:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:50,766 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:50,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342209162] [2021-05-06 08:22:50,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:50,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-06 08:22:50,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:51,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 107 proven. 63 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-05-06 08:22:51,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:51,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311954515] [2021-05-06 08:22:51,391 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:51,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342209162] [2021-05-06 08:22:51,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342209162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:51,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:51,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:22:51,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241173563] [2021-05-06 08:22:51,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:22:51,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:51,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:22:51,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:51,392 INFO L87 Difference]: Start difference. First operand 3005 states and 4024 transitions. Second operand has 19 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:22:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:52,293 INFO L93 Difference]: Finished difference Result 3144 states and 4209 transitions. [2021-05-06 08:22:52,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:22:52,294 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 115 [2021-05-06 08:22:52,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:52,303 INFO L225 Difference]: With dead ends: 3144 [2021-05-06 08:22:52,303 INFO L226 Difference]: Without dead ends: 3143 [2021-05-06 08:22:52,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:22:52,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3143 states. [2021-05-06 08:22:52,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3143 to 3059. [2021-05-06 08:22:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 2016 states have (on average 1.2197420634920635) internal successors, (2459), 2056 states have internal predecessors, (2459), 812 states have call successors, (812), 231 states have call predecessors, (812), 230 states have return successors, (806), 771 states have call predecessors, (806), 806 states have call successors, (806) [2021-05-06 08:22:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4077 transitions. [2021-05-06 08:22:52,366 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 4077 transitions. Word has length 115 [2021-05-06 08:22:52,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:52,366 INFO L480 AbstractCegarLoop]: Abstraction has 3059 states and 4077 transitions. [2021-05-06 08:22:52,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:22:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 4077 transitions. [2021-05-06 08:22:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-06 08:22:52,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:52,368 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:52,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:52,593 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:52,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:52,594 INFO L82 PathProgramCache]: Analyzing trace with hash 660396276, now seen corresponding path program 2 times [2021-05-06 08:22:52,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:52,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554092322] [2021-05-06 08:22:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:52,599 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:52,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578503604] [2021-05-06 08:22:52,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:52,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:52,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:52,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:22:52,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:52,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 30 proven. 48 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2021-05-06 08:22:52,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:52,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554092322] [2021-05-06 08:22:52,973 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:52,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578503604] [2021-05-06 08:22:52,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578503604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:52,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:52,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:22:52,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83209642] [2021-05-06 08:22:52,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:22:52,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:52,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:22:52,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:22:52,974 INFO L87 Difference]: Start difference. First operand 3059 states and 4077 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 08:22:53,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:53,772 INFO L93 Difference]: Finished difference Result 3571 states and 4894 transitions. [2021-05-06 08:22:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 08:22:53,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 120 [2021-05-06 08:22:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:53,782 INFO L225 Difference]: With dead ends: 3571 [2021-05-06 08:22:53,782 INFO L226 Difference]: Without dead ends: 3571 [2021-05-06 08:22:53,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 08:22:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3571 states. [2021-05-06 08:22:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3571 to 3100. [2021-05-06 08:22:53,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 2040 states have (on average 1.219607843137255) internal successors, (2488), 2080 states have internal predecessors, (2488), 824 states have call successors, (824), 236 states have call predecessors, (824), 235 states have return successors, (818), 783 states have call predecessors, (818), 818 states have call successors, (818) [2021-05-06 08:22:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 4130 transitions. [2021-05-06 08:22:53,865 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 4130 transitions. Word has length 120 [2021-05-06 08:22:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:53,866 INFO L480 AbstractCegarLoop]: Abstraction has 3100 states and 4130 transitions. [2021-05-06 08:22:53,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 08:22:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 4130 transitions. [2021-05-06 08:22:53,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-06 08:22:53,868 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:53,868 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:54,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-05-06 08:22:54,073 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:54,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:54,073 INFO L82 PathProgramCache]: Analyzing trace with hash -347512269, now seen corresponding path program 2 times [2021-05-06 08:22:54,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:54,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091954942] [2021-05-06 08:22:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:54,079 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:54,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897971655] [2021-05-06 08:22:54,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:54,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:54,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:54,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:22:54,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:54,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 24 proven. 262 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-06 08:22:54,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:54,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091954942] [2021-05-06 08:22:54,428 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:54,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897971655] [2021-05-06 08:22:54,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897971655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:54,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:54,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:22:54,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466124639] [2021-05-06 08:22:54,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:22:54,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:54,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:22:54,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:54,429 INFO L87 Difference]: Start difference. First operand 3100 states and 4130 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:22:54,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:54,775 INFO L93 Difference]: Finished difference Result 3106 states and 4128 transitions. [2021-05-06 08:22:54,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 08:22:54,776 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 121 [2021-05-06 08:22:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:54,783 INFO L225 Difference]: With dead ends: 3106 [2021-05-06 08:22:54,784 INFO L226 Difference]: Without dead ends: 3106 [2021-05-06 08:22:54,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=204, Invalid=348, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:22:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2021-05-06 08:22:54,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 3100. [2021-05-06 08:22:54,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 2040 states have (on average 1.217156862745098) internal successors, (2483), 2080 states have internal predecessors, (2483), 824 states have call successors, (824), 236 states have call predecessors, (824), 235 states have return successors, (818), 783 states have call predecessors, (818), 818 states have call successors, (818) [2021-05-06 08:22:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 4125 transitions. [2021-05-06 08:22:54,844 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 4125 transitions. Word has length 121 [2021-05-06 08:22:54,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:54,845 INFO L480 AbstractCegarLoop]: Abstraction has 3100 states and 4125 transitions. [2021-05-06 08:22:54,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:22:54,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 4125 transitions. [2021-05-06 08:22:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 08:22:54,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:54,848 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:55,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:55,065 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2145145311, now seen corresponding path program 8 times [2021-05-06 08:22:55,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:55,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742307607] [2021-05-06 08:22:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:55,071 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:55,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935483783] [2021-05-06 08:22:55,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:55,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:55,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 100 conjunts are in the unsatisfiable core [2021-05-06 08:22:55,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:55,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 75 proven. 103 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-06 08:22:55,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:55,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742307607] [2021-05-06 08:22:55,760 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:55,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935483783] [2021-05-06 08:22:55,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935483783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:55,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:55,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:22:55,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359472986] [2021-05-06 08:22:55,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:22:55,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:22:55,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:55,761 INFO L87 Difference]: Start difference. First operand 3100 states and 4125 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:22:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:56,974 INFO L93 Difference]: Finished difference Result 3260 states and 4355 transitions. [2021-05-06 08:22:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:22:56,974 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 122 [2021-05-06 08:22:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:56,981 INFO L225 Difference]: With dead ends: 3260 [2021-05-06 08:22:56,981 INFO L226 Difference]: Without dead ends: 3259 [2021-05-06 08:22:56,982 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 657.0ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-05-06 08:22:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2021-05-06 08:22:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 3223. [2021-05-06 08:22:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 2110 states have (on average 1.2222748815165876) internal successors, (2579), 2154 states have internal predecessors, (2579), 870 states have call successors, (870), 243 states have call predecessors, (870), 242 states have return successors, (864), 825 states have call predecessors, (864), 864 states have call successors, (864) [2021-05-06 08:22:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 4313 transitions. [2021-05-06 08:22:57,042 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 4313 transitions. Word has length 122 [2021-05-06 08:22:57,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:57,042 INFO L480 AbstractCegarLoop]: Abstraction has 3223 states and 4313 transitions. [2021-05-06 08:22:57,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:22:57,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 4313 transitions. [2021-05-06 08:22:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-06 08:22:57,044 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:57,045 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:57,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-05-06 08:22:57,261 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:57,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:57,261 INFO L82 PathProgramCache]: Analyzing trace with hash -510906365, now seen corresponding path program 1 times [2021-05-06 08:22:57,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:57,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178601301] [2021-05-06 08:22:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:57,266 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:57,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763317028] [2021-05-06 08:22:57,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:57,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 102 conjunts are in the unsatisfiable core [2021-05-06 08:22:57,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:57,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:57,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 96 proven. 124 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-06 08:22:58,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:58,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178601301] [2021-05-06 08:22:58,001 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:58,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763317028] [2021-05-06 08:22:58,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763317028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:58,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:58,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:22:58,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623715536] [2021-05-06 08:22:58,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:22:58,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:58,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:22:58,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:58,003 INFO L87 Difference]: Start difference. First operand 3223 states and 4313 transitions. Second operand has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:22:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:58,882 INFO L93 Difference]: Finished difference Result 3395 states and 4557 transitions. [2021-05-06 08:22:58,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:22:58,883 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 125 [2021-05-06 08:22:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:58,889 INFO L225 Difference]: With dead ends: 3395 [2021-05-06 08:22:58,889 INFO L226 Difference]: Without dead ends: 3395 [2021-05-06 08:22:58,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 565.4ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-05-06 08:22:58,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-05-06 08:22:58,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 3290. [2021-05-06 08:22:58,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 2150 states have (on average 1.2241860465116279) internal successors, (2632), 2194 states have internal predecessors, (2632), 890 states have call successors, (890), 250 states have call predecessors, (890), 249 states have return successors, (884), 845 states have call predecessors, (884), 884 states have call successors, (884) [2021-05-06 08:22:58,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 4406 transitions. [2021-05-06 08:22:58,952 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 4406 transitions. Word has length 125 [2021-05-06 08:22:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:58,953 INFO L480 AbstractCegarLoop]: Abstraction has 3290 states and 4406 transitions. [2021-05-06 08:22:58,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:22:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 4406 transitions. [2021-05-06 08:22:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-06 08:22:58,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:58,956 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:59,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-06 08:22:59,181 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:59,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2946020, now seen corresponding path program 4 times [2021-05-06 08:22:59,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:59,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714907079] [2021-05-06 08:22:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:59,187 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:59,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907519442] [2021-05-06 08:22:59,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:59,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:59,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:59,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:22:59,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:59,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 279 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-06 08:22:59,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:59,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714907079] [2021-05-06 08:22:59,585 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:59,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907519442] [2021-05-06 08:22:59,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907519442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:59,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:59,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:22:59,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080058166] [2021-05-06 08:22:59,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:22:59,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:59,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:22:59,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:59,587 INFO L87 Difference]: Start difference. First operand 3290 states and 4406 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:22:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:59,968 INFO L93 Difference]: Finished difference Result 3354 states and 4466 transitions. [2021-05-06 08:22:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 08:22:59,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 125 [2021-05-06 08:22:59,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:59,979 INFO L225 Difference]: With dead ends: 3354 [2021-05-06 08:22:59,979 INFO L226 Difference]: Without dead ends: 3354 [2021-05-06 08:22:59,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:22:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-05-06 08:23:00,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 3299. [2021-05-06 08:23:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3299 states, 2159 states have (on average 1.22325150532654) internal successors, (2641), 2203 states have internal predecessors, (2641), 890 states have call successors, (890), 250 states have call predecessors, (890), 249 states have return successors, (884), 845 states have call predecessors, (884), 884 states have call successors, (884) [2021-05-06 08:23:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3299 states to 3299 states and 4415 transitions. [2021-05-06 08:23:00,043 INFO L78 Accepts]: Start accepts. Automaton has 3299 states and 4415 transitions. Word has length 125 [2021-05-06 08:23:00,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:00,044 INFO L480 AbstractCegarLoop]: Abstraction has 3299 states and 4415 transitions. [2021-05-06 08:23:00,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:23:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3299 states and 4415 transitions. [2021-05-06 08:23:00,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 08:23:00,046 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:00,046 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:00,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-06 08:23:00,265 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:00,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:00,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1377829051, now seen corresponding path program 2 times [2021-05-06 08:23:00,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:00,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974649050] [2021-05-06 08:23:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:00,270 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:00,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679048278] [2021-05-06 08:23:00,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:00,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:00,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:00,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:23:00,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:00,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 35 proven. 275 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-06 08:23:00,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:00,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974649050] [2021-05-06 08:23:00,621 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:00,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679048278] [2021-05-06 08:23:00,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679048278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:00,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:00,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:23:00,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853746218] [2021-05-06 08:23:00,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:23:00,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:00,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:23:00,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:23:00,622 INFO L87 Difference]: Start difference. First operand 3299 states and 4415 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:23:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:00,939 INFO L93 Difference]: Finished difference Result 3374 states and 4485 transitions. [2021-05-06 08:23:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 08:23:00,940 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 127 [2021-05-06 08:23:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:00,944 INFO L225 Difference]: With dead ends: 3374 [2021-05-06 08:23:00,944 INFO L226 Difference]: Without dead ends: 3374 [2021-05-06 08:23:00,944 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:23:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2021-05-06 08:23:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 3354. [2021-05-06 08:23:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 2214 states have (on average 1.2168021680216803) internal successors, (2694), 2258 states have internal predecessors, (2694), 890 states have call successors, (890), 250 states have call predecessors, (890), 249 states have return successors, (884), 845 states have call predecessors, (884), 884 states have call successors, (884) [2021-05-06 08:23:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 4468 transitions. [2021-05-06 08:23:00,988 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 4468 transitions. Word has length 127 [2021-05-06 08:23:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:00,988 INFO L480 AbstractCegarLoop]: Abstraction has 3354 states and 4468 transitions. [2021-05-06 08:23:00,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:23:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 4468 transitions. [2021-05-06 08:23:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-06 08:23:00,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:00,991 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:01,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-06 08:23:01,209 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:01,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:01,210 INFO L82 PathProgramCache]: Analyzing trace with hash 95675211, now seen corresponding path program 9 times [2021-05-06 08:23:01,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:01,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915457025] [2021-05-06 08:23:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:01,215 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:01,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827923726] [2021-05-06 08:23:01,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:01,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-06 08:23:01,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:01,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-06 08:23:01,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:01,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:01,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:02,223 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-05-06 08:23:02,436 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-05-06 08:23:02,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:02,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:02,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:02,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:02,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:02,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:02,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:02,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:02,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:02,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 119 proven. 45 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2021-05-06 08:23:02,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:02,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915457025] [2021-05-06 08:23:02,532 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:02,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827923726] [2021-05-06 08:23:02,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827923726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:02,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:02,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:23:02,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014451920] [2021-05-06 08:23:02,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:23:02,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:02,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:23:02,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:23:02,534 INFO L87 Difference]: Start difference. First operand 3354 states and 4468 transitions. Second operand has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 08:23:05,481 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-05-06 08:23:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:17,650 INFO L93 Difference]: Finished difference Result 3650 states and 4867 transitions. [2021-05-06 08:23:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:23:17,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 131 [2021-05-06 08:23:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:17,657 INFO L225 Difference]: With dead ends: 3650 [2021-05-06 08:23:17,657 INFO L226 Difference]: Without dead ends: 3629 [2021-05-06 08:23:17,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2813.7ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:23:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2021-05-06 08:23:17,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3589. [2021-05-06 08:23:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 2368 states have (on average 1.2204391891891893) internal successors, (2890), 2416 states have internal predecessors, (2890), 959 states have call successors, (959), 262 states have call predecessors, (959), 261 states have return successors, (954), 910 states have call predecessors, (954), 954 states have call successors, (954) [2021-05-06 08:23:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 4803 transitions. [2021-05-06 08:23:17,708 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 4803 transitions. Word has length 131 [2021-05-06 08:23:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:17,708 INFO L480 AbstractCegarLoop]: Abstraction has 3589 states and 4803 transitions. [2021-05-06 08:23:17,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 08:23:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 4803 transitions. [2021-05-06 08:23:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 08:23:17,711 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:17,711 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:17,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:17,925 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:17,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:17,925 INFO L82 PathProgramCache]: Analyzing trace with hash -767499375, now seen corresponding path program 10 times [2021-05-06 08:23:17,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:17,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187964710] [2021-05-06 08:23:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:17,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:17,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94888399] [2021-05-06 08:23:17,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:18,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:18,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:18,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-06 08:23:18,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:18,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,526 WARN L159 QuantifierPusher]: Ignoring assumption.