/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/egcd-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:07:30,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:07:30,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:07:31,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:07:31,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:07:31,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:07:31,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:07:31,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:07:31,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:07:31,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:07:31,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:07:31,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:07:31,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:07:31,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:07:31,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:07:31,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:07:31,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:07:31,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:07:31,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:07:31,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:07:31,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:07:31,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:07:31,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:07:31,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:07:31,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:07:31,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:07:31,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:07:31,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:07:31,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:07:31,080 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:07:31,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:07:31,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:07:31,083 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:07:31,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:07:31,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:07:31,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:07:31,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:07:31,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:07:31,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:07:31,084 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:07:31,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:07:31,085 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:07:31,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:07:31,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:07:31,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:07:31,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:07:31,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:07:31,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:07:31,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:07:31,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:07:31,086 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:07:31,086 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:07:31,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:07:31,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:07:31,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:07:31,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:07:31,366 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:07:31,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c [2021-05-06 08:07:31,416 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5687be62e/3b48b40388a24c63b9492204f7c0bb54/FLAG581d44388 [2021-05-06 08:07:31,788 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:07:31,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c [2021-05-06 08:07:31,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5687be62e/3b48b40388a24c63b9492204f7c0bb54/FLAG581d44388 [2021-05-06 08:07:31,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5687be62e/3b48b40388a24c63b9492204f7c0bb54 [2021-05-06 08:07:31,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:07:31,816 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:07:31,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:07:31,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:07:31,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:07:31,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:07:31" (1/1) ... [2021-05-06 08:07:31,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ce164d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:31, skipping insertion in model container [2021-05-06 08:07:31,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:07:31" (1/1) ... [2021-05-06 08:07:31,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:07:31,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:07:31,961 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/egcd-ll_unwindbound10.c[489,502] [2021-05-06 08:07:31,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:07:32,003 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:07:32,026 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/egcd-ll_unwindbound10.c[489,502] [2021-05-06 08:07:32,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:07:32,049 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:07:32,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:32 WrapperNode [2021-05-06 08:07:32,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:07:32,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:07:32,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:07:32,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:07:32,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:32" (1/1) ... [2021-05-06 08:07:32,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:32" (1/1) ... [2021-05-06 08:07:32,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:32" (1/1) ... [2021-05-06 08:07:32,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:32" (1/1) ... [2021-05-06 08:07:32,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:32" (1/1) ... [2021-05-06 08:07:32,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:32" (1/1) ... [2021-05-06 08:07:32,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:32" (1/1) ... [2021-05-06 08:07:32,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:07:32,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:07:32,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:07:32,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:07:32,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:32" (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 08:07:32,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:07:32,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:07:32,160 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:07:32,160 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:07:32,160 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:07:32,160 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:07:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:07:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:07:32,160 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:07:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:07:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:07:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:07:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:07:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:07:32,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:07:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:07:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:07:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:07:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:07:32,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:07:32,407 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:07:32,407 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:07:32,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:07:32 BoogieIcfgContainer [2021-05-06 08:07:32,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:07:32,409 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:07:32,409 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:07:32,409 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:07:32,411 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:07:32" (1/1) ... [2021-05-06 08:07:32,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:07:32 BasicIcfg [2021-05-06 08:07:32,436 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:07:32,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:07:32,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:07:32,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:07:32,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:07:31" (1/4) ... [2021-05-06 08:07:32,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b505b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:07:32, skipping insertion in model container [2021-05-06 08:07:32,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:07:32" (2/4) ... [2021-05-06 08:07:32,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b505b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:07:32, skipping insertion in model container [2021-05-06 08:07:32,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:07:32" (3/4) ... [2021-05-06 08:07:32,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b505b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:07:32, skipping insertion in model container [2021-05-06 08:07:32,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:07:32" (4/4) ... [2021-05-06 08:07:32,442 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound10.cJordan [2021-05-06 08:07:32,446 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:07:32,449 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:07:32,459 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:07:32,474 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:07:32,474 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:07:32,474 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:07:32,474 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:07:32,474 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:07:32,474 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:07:32,474 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:07:32,475 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:07:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:07:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:07:32,492 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:32,492 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 08:07:32,492 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:32,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:32,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2021-05-06 08:07:32,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:32,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12004466] [2021-05-06 08:07:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:32,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:07:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:32,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:07:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:32,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:07:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:32,763 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 08:07:32,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:32,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12004466] [2021-05-06 08:07:32,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12004466] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:32,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:32,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:07:32,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412829015] [2021-05-06 08:07:32,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:07:32,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:32,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:07:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:07:32,778 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:07:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:32,901 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-05-06 08:07:32,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:07:32,903 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-06 08:07:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:32,908 INFO L225 Difference]: With dead ends: 36 [2021-05-06 08:07:32,908 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 08:07:32,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:07:32,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 08:07:32,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-06 08:07:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:07:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 08:07:32,938 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-06 08:07:32,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:32,939 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 08:07:32,939 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:07:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 08:07:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:07:32,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:32,941 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 08:07:32,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:07:32,941 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:32,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:32,942 INFO L82 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2021-05-06 08:07:32,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:32,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350505938] [2021-05-06 08:07:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:33,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:07:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:33,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:07:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:33,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:07:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:33,094 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 08:07:33,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:33,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350505938] [2021-05-06 08:07:33,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350505938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:33,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:33,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:07:33,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514298380] [2021-05-06 08:07:33,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:07:33,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:33,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:07:33,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:07:33,096 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:07:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:33,236 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-05-06 08:07:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:07:33,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:07:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:33,238 INFO L225 Difference]: With dead ends: 32 [2021-05-06 08:07:33,238 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:07:33,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:07:33,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:07:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:07:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:07:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 08:07:33,251 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-06 08:07:33,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:33,251 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 08:07:33,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:07:33,251 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 08:07:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:07:33,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:33,252 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 08:07:33,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:07:33,252 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2021-05-06 08:07:33,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:33,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936187965] [2021-05-06 08:07:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:33,261 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:33,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296885039] [2021-05-06 08:07:33,261 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 08:07:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:33,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:07:33,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:33,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:33,483 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 08:07:33,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:33,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936187965] [2021-05-06 08:07:33,483 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:33,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296885039] [2021-05-06 08:07:33,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296885039] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:33,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:33,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:07:33,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51567704] [2021-05-06 08:07:33,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:07:33,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:33,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:07:33,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:07:33,487 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 08:07:33,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:33,532 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-05-06 08:07:33,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:07:33,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 23 [2021-05-06 08:07:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:33,533 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:07:33,534 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:07:33,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:07:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:07:33,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-06 08:07:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:07:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-06 08:07:33,539 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-06 08:07:33,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:33,540 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-06 08:07:33,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 08:07:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-06 08:07:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:07:33,540 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:33,540 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] [2021-05-06 08:07:33,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 08:07:33,763 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:33,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:33,764 INFO L82 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2021-05-06 08:07:33,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:33,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446260040] [2021-05-06 08:07:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:33,776 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:33,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856611935] [2021-05-06 08:07:33,776 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 08:07:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:33,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:07:33,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:33,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:33,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:34,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:34,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:34,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:34,030 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 08:07:34,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:34,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446260040] [2021-05-06 08:07:34,030 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:34,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856611935] [2021-05-06 08:07:34,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856611935] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:34,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:34,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:07:34,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557767871] [2021-05-06 08:07:34,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:07:34,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:34,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:07:34,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:07:34,031 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 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 08:07:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:34,117 INFO L93 Difference]: Finished difference Result 69 states and 102 transitions. [2021-05-06 08:07:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:07:34,118 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 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 28 [2021-05-06 08:07:34,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:34,120 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:07:34,120 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:07:34,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:07:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:07:34,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-06 08:07:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:07:34,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-06 08:07:34,127 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-06 08:07:34,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:34,128 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-06 08:07:34,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 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 08:07:34,128 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-06 08:07:34,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:07:34,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:34,129 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] [2021-05-06 08:07:34,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:34,346 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:34,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:34,347 INFO L82 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2021-05-06 08:07:34,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:34,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526718238] [2021-05-06 08:07:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:34,353 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:34,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494355093] [2021-05-06 08:07:34,354 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 08:07:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:34,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:07:34,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:34,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 08:07:34,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:34,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526718238] [2021-05-06 08:07:34,485 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:34,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494355093] [2021-05-06 08:07:34,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494355093] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:34,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:34,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:07:34,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498533314] [2021-05-06 08:07:34,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:07:34,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:34,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:07:34,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:07:34,486 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:07:34,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:34,530 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-05-06 08:07:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:07:34,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:07:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:34,535 INFO L225 Difference]: With dead ends: 67 [2021-05-06 08:07:34,535 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 08:07:34,535 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:07:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 08:07:34,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 08:07:34,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:07:34,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-06 08:07:34,540 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-06 08:07:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:34,540 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-06 08:07:34,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:07:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-06 08:07:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:07:34,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:34,541 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] [2021-05-06 08:07:34,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:34,759 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:34,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:34,759 INFO L82 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2021-05-06 08:07:34,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:34,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580231380] [2021-05-06 08:07:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:34,766 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:34,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647438824] [2021-05-06 08:07:34,766 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 08:07:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:34,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:07:34,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:34,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:34,993 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 08:07:34,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:34,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580231380] [2021-05-06 08:07:34,993 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:34,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647438824] [2021-05-06 08:07:34,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647438824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:34,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:34,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:07:34,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116153852] [2021-05-06 08:07:34,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:07:34,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:34,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:07:34,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:07:34,994 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 08:07:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:35,027 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2021-05-06 08:07:35,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:07:35,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-06 08:07:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:35,028 INFO L225 Difference]: With dead ends: 75 [2021-05-06 08:07:35,028 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 08:07:35,029 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:07:35,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 08:07:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-06 08:07:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:07:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-06 08:07:35,034 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-06 08:07:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:35,034 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-06 08:07:35,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 08:07:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-06 08:07:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:07:35,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:35,035 INFO L523 BasicCegarLoop]: trace histogram [4, 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] [2021-05-06 08:07:35,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:35,236 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:35,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2021-05-06 08:07:35,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:35,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21417416] [2021-05-06 08:07:35,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:35,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:35,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925049685] [2021-05-06 08:07:35,248 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 08:07:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:35,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:07:35,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:35,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:35,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:35,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:35,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:35,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:35,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:35,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:35,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:07:35,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:35,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21417416] [2021-05-06 08:07:35,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:35,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925049685] [2021-05-06 08:07:35,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925049685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:35,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:35,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:07:35,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298049011] [2021-05-06 08:07:35,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:07:35,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:35,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:07:35,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:07:35,461 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:07:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:35,504 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2021-05-06 08:07:35,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:07:35,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 08:07:35,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:35,506 INFO L225 Difference]: With dead ends: 99 [2021-05-06 08:07:35,506 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 08:07:35,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:07:35,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 08:07:35,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-06 08:07:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 08:07:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-06 08:07:35,511 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-06 08:07:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:35,511 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-06 08:07:35,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:07:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-06 08:07:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:07:35,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:35,512 INFO L523 BasicCegarLoop]: trace histogram [4, 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] [2021-05-06 08:07:35,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 08:07:35,729 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:35,729 INFO L82 PathProgramCache]: Analyzing trace with hash -739890515, now seen corresponding path program 1 times [2021-05-06 08:07:35,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:35,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67415301] [2021-05-06 08:07:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:35,735 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:35,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124112307] [2021-05-06 08:07:35,735 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 08:07:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:35,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:07:35,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:35,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:07:35,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:35,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67415301] [2021-05-06 08:07:35,949 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:35,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124112307] [2021-05-06 08:07:35,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124112307] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:07:35,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:07:35,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:07:35,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062843970] [2021-05-06 08:07:35,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:07:35,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:35,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:07:35,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:07:35,953 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 08:07:36,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:36,001 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2021-05-06 08:07:36,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:07:36,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 42 [2021-05-06 08:07:36,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:36,003 INFO L225 Difference]: With dead ends: 104 [2021-05-06 08:07:36,003 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 08:07:36,003 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:07:36,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 08:07:36,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-06 08:07:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 08:07:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 08:07:36,009 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-06 08:07:36,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:36,009 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 08:07:36,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 08:07:36,009 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 08:07:36,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:07:36,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:36,010 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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 08:07:36,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:36,225 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:36,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:36,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1527150038, now seen corresponding path program 1 times [2021-05-06 08:07:36,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:36,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113255717] [2021-05-06 08:07:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:36,232 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:36,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606564684] [2021-05-06 08:07:36,232 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 08:07:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:36,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:07:36,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:36,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:36,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:36,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:07:36,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:36,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113255717] [2021-05-06 08:07:36,440 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:36,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606564684] [2021-05-06 08:07:36,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606564684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:36,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:36,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:07:36,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522316515] [2021-05-06 08:07:36,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:07:36,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:36,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:07:36,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:07:36,442 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:07:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:36,578 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-06 08:07:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:07:36,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 08:07:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:36,580 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:07:36,580 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 08:07:36,580 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:07:36,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 08:07:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-06 08:07:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 08:07:36,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-06 08:07:36,585 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-06 08:07:36,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:36,585 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-06 08:07:36,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:07:36,585 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-06 08:07:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:07:36,586 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:36,586 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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 08:07:36,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:36,805 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:36,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:36,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1237367986, now seen corresponding path program 1 times [2021-05-06 08:07:36,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:36,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64790667] [2021-05-06 08:07:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:36,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:36,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134027239] [2021-05-06 08:07:36,820 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 08:07:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 08:07:36,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:36,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:36,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:37,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:37,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:37,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:37,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:37,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:37,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:37,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:37,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:37,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 08:07:37,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:37,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64790667] [2021-05-06 08:07:37,128 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:37,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134027239] [2021-05-06 08:07:37,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134027239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:37,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:37,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:07:37,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382488072] [2021-05-06 08:07:37,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:07:37,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:37,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:07:37,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:07:37,129 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:07:37,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:37,295 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2021-05-06 08:07:37,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:07:37,296 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-06 08:07:37,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:37,297 INFO L225 Difference]: With dead ends: 129 [2021-05-06 08:07:37,297 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 08:07:37,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:07:37,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 08:07:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-06 08:07:37,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 08:07:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-06 08:07:37,302 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-06 08:07:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:37,302 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-06 08:07:37,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:07:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-06 08:07:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:07:37,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:37,303 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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 08:07:37,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:07:37,517 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:37,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:37,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1023588343, now seen corresponding path program 2 times [2021-05-06 08:07:37,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:37,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528388652] [2021-05-06 08:07:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:37,523 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:37,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423564414] [2021-05-06 08:07:37,523 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 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 08:07:37,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:07:37,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:37,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 08:07:37,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:37,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-06 08:07:37,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:37,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528388652] [2021-05-06 08:07:37,704 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:37,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423564414] [2021-05-06 08:07:37,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423564414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:37,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:37,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:07:37,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327227180] [2021-05-06 08:07:37,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:07:37,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:37,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:07:37,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:07:37,705 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:07:37,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:37,868 INFO L93 Difference]: Finished difference Result 149 states and 201 transitions. [2021-05-06 08:07:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:07:37,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-05-06 08:07:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:37,873 INFO L225 Difference]: With dead ends: 149 [2021-05-06 08:07:37,873 INFO L226 Difference]: Without dead ends: 145 [2021-05-06 08:07:37,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:07:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-06 08:07:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-06 08:07:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 08:07:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-06 08:07:37,879 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-06 08:07:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:37,880 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-06 08:07:37,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:07:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-06 08:07:37,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:07:37,881 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:37,881 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1] [2021-05-06 08:07:38,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:38,097 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1153573054, now seen corresponding path program 2 times [2021-05-06 08:07:38,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:38,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144549936] [2021-05-06 08:07:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:38,108 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:38,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272229860] [2021-05-06 08:07:38,108 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 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 08:07:38,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:07:38,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:38,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:07:38,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:38,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:38,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:38,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:38,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:38,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:38,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:38,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:38,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:38,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:38,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:38,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:07:38,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:38,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144549936] [2021-05-06 08:07:38,416 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:38,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272229860] [2021-05-06 08:07:38,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272229860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:38,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:38,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:07:38,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032715892] [2021-05-06 08:07:38,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:07:38,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:38,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:07:38,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:07:38,418 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:07:38,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:38,476 INFO L93 Difference]: Finished difference Result 173 states and 215 transitions. [2021-05-06 08:07:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:07:38,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-06 08:07:38,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:38,478 INFO L225 Difference]: With dead ends: 173 [2021-05-06 08:07:38,478 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 08:07:38,478 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:07:38,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 08:07:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 08:07:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 08:07:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2021-05-06 08:07:38,483 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2021-05-06 08:07:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:38,483 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2021-05-06 08:07:38,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:07:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2021-05-06 08:07:38,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:07:38,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:38,484 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-06 08:07:38,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:38,685 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:38,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:38,685 INFO L82 PathProgramCache]: Analyzing trace with hash -264996897, now seen corresponding path program 1 times [2021-05-06 08:07:38,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:38,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009184283] [2021-05-06 08:07:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:38,691 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:38,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902643182] [2021-05-06 08:07:38,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:07:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:38,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:07:38,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:38,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 08:07:38,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:38,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009184283] [2021-05-06 08:07:38,999 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:38,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902643182] [2021-05-06 08:07:38,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902643182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:38,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:38,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:07:38,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999789547] [2021-05-06 08:07:39,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:07:39,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:39,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:07:39,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:07:39,001 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 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 08:07:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:39,106 INFO L93 Difference]: Finished difference Result 186 states and 235 transitions. [2021-05-06 08:07:39,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:07:39,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 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 61 [2021-05-06 08:07:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:39,107 INFO L225 Difference]: With dead ends: 186 [2021-05-06 08:07:39,107 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 08:07:39,107 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:07:39,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 08:07:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-06 08:07:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 118 states have internal predecessors, (128), 54 states have call successors, (54), 22 states have call predecessors, (54), 21 states have return successors, (50), 43 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 08:07:39,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 08:07:39,118 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 61 [2021-05-06 08:07:39,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:39,118 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 08:07:39,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 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 08:07:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 08:07:39,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:07:39,119 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:39,119 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-06 08:07:39,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:07:39,325 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:39,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:39,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1121480771, now seen corresponding path program 2 times [2021-05-06 08:07:39,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:39,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304917294] [2021-05-06 08:07:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:39,333 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:39,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832055673] [2021-05-06 08:07:39,333 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 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 08:07:39,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:07:39,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:39,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:07:39,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:39,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 08:07:39,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:39,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304917294] [2021-05-06 08:07:39,553 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:39,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832055673] [2021-05-06 08:07:39,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832055673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:39,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:39,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:07:39,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597393804] [2021-05-06 08:07:39,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:07:39,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:39,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:07:39,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:07:39,555 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 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 08:07:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:39,647 INFO L93 Difference]: Finished difference Result 196 states and 250 transitions. [2021-05-06 08:07:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:07:39,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 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 61 [2021-05-06 08:07:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:39,648 INFO L225 Difference]: With dead ends: 196 [2021-05-06 08:07:39,649 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 08:07:39,649 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:07:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 08:07:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 08:07:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 122 states have internal predecessors, (132), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (53), 46 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 08:07:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 242 transitions. [2021-05-06 08:07:39,654 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 242 transitions. Word has length 61 [2021-05-06 08:07:39,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:39,654 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 242 transitions. [2021-05-06 08:07:39,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 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 08:07:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 242 transitions. [2021-05-06 08:07:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 08:07:39,655 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:39,655 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-06 08:07:39,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:07:39,870 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:39,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:39,870 INFO L82 PathProgramCache]: Analyzing trace with hash -718576292, now seen corresponding path program 2 times [2021-05-06 08:07:39,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:39,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927965523] [2021-05-06 08:07:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:39,895 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:39,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135688502] [2021-05-06 08:07:39,895 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 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 08:07:39,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:07:39,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:39,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:07:39,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:40,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-06 08:07:40,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:40,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927965523] [2021-05-06 08:07:40,217 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:40,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135688502] [2021-05-06 08:07:40,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135688502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:40,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:40,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:07:40,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586893778] [2021-05-06 08:07:40,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:07:40,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:40,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:07:40,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:07:40,218 INFO L87 Difference]: Start difference. First operand 192 states and 242 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:07:40,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:40,435 INFO L93 Difference]: Finished difference Result 217 states and 279 transitions. [2021-05-06 08:07:40,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:07:40,436 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 08:07:40,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:40,437 INFO L225 Difference]: With dead ends: 217 [2021-05-06 08:07:40,437 INFO L226 Difference]: Without dead ends: 217 [2021-05-06 08:07:40,437 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:07:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-06 08:07:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2021-05-06 08:07:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 134 states have internal predecessors, (148), 63 states have call successors, (63), 25 states have call predecessors, (63), 24 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:07:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2021-05-06 08:07:40,443 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 66 [2021-05-06 08:07:40,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:40,443 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2021-05-06 08:07:40,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:07:40,443 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2021-05-06 08:07:40,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 08:07:40,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:40,444 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-06 08:07:40,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:07:40,644 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:40,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:40,645 INFO L82 PathProgramCache]: Analyzing trace with hash -367776355, now seen corresponding path program 3 times [2021-05-06 08:07:40,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:40,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327690623] [2021-05-06 08:07:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:40,650 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:40,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742249330] [2021-05-06 08:07:40,650 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 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 08:07:40,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:07:40,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:40,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 08:07:40,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:40,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:07:40,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:40,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327690623] [2021-05-06 08:07:40,918 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:40,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742249330] [2021-05-06 08:07:40,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742249330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:40,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:40,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:07:40,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176277586] [2021-05-06 08:07:40,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:07:40,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:40,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:07:40,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:07:40,919 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:07:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:41,025 INFO L93 Difference]: Finished difference Result 233 states and 300 transitions. [2021-05-06 08:07:41,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:07:41,025 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), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 08:07:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:41,026 INFO L225 Difference]: With dead ends: 233 [2021-05-06 08:07:41,026 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 08:07:41,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:07:41,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 08:07:41,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2021-05-06 08:07:41,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 138 states have internal predecessors, (153), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:07:41,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2021-05-06 08:07:41,034 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 66 [2021-05-06 08:07:41,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:41,034 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2021-05-06 08:07:41,034 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), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:07:41,034 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2021-05-06 08:07:41,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 08:07:41,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:41,036 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2021-05-06 08:07:41,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:41,241 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash 876232379, now seen corresponding path program 4 times [2021-05-06 08:07:41,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:41,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333344930] [2021-05-06 08:07:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:41,246 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:41,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126453210] [2021-05-06 08:07:41,246 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 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 08:07:41,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:07:41,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:41,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 08:07:41,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:41,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 47 proven. 25 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-05-06 08:07:41,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:41,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333344930] [2021-05-06 08:07:41,593 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:41,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126453210] [2021-05-06 08:07:41,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126453210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:41,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:41,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:07:41,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293107973] [2021-05-06 08:07:41,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:07:41,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:41,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:07:41,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:07:41,595 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 08:07:41,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:41,876 INFO L93 Difference]: Finished difference Result 240 states and 308 transitions. [2021-05-06 08:07:41,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:07:41,876 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 08:07:41,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:41,877 INFO L225 Difference]: With dead ends: 240 [2021-05-06 08:07:41,877 INFO L226 Difference]: Without dead ends: 235 [2021-05-06 08:07:41,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:07:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-06 08:07:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2021-05-06 08:07:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 115 states have (on average 1.182608695652174) internal successors, (136), 124 states have internal predecessors, (136), 54 states have call successors, (54), 24 states have call predecessors, (54), 23 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 08:07:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 240 transitions. [2021-05-06 08:07:41,883 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 240 transitions. Word has length 71 [2021-05-06 08:07:41,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:41,883 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 240 transitions. [2021-05-06 08:07:41,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 08:07:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 240 transitions. [2021-05-06 08:07:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 08:07:41,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:41,883 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2021-05-06 08:07:42,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:07:42,097 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:42,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1468434662, now seen corresponding path program 3 times [2021-05-06 08:07:42,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:42,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765045959] [2021-05-06 08:07:42,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:42,102 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:42,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726012884] [2021-05-06 08:07:42,102 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 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 08:07:42,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:07:42,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:42,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:07:42,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:42,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-06 08:07:42,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:42,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765045959] [2021-05-06 08:07:42,333 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:42,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726012884] [2021-05-06 08:07:42,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726012884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:42,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:42,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:07:42,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830533111] [2021-05-06 08:07:42,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:07:42,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:42,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:07:42,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:07:42,334 INFO L87 Difference]: Start difference. First operand 193 states and 240 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:07:42,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:42,619 INFO L93 Difference]: Finished difference Result 227 states and 290 transitions. [2021-05-06 08:07:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:07:42,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-06 08:07:42,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:42,620 INFO L225 Difference]: With dead ends: 227 [2021-05-06 08:07:42,620 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 08:07:42,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:07:42,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 08:07:42,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2021-05-06 08:07:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 139 states have internal predecessors, (155), 60 states have call successors, (60), 27 states have call predecessors, (60), 26 states have return successors, (56), 50 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-06 08:07:42,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2021-05-06 08:07:42,625 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 271 transitions. Word has length 71 [2021-05-06 08:07:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:42,625 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 271 transitions. [2021-05-06 08:07:42,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:07:42,626 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 271 transitions. [2021-05-06 08:07:42,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:07:42,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:42,626 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 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 08:07:42,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:07:42,841 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:42,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:42,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1531334864, now seen corresponding path program 3 times [2021-05-06 08:07:42,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:42,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599230717] [2021-05-06 08:07:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:42,846 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:42,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544878281] [2021-05-06 08:07:42,846 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 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 08:07:42,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:07:42,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:42,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:07:42,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:42,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:07:42,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:42,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599230717] [2021-05-06 08:07:42,994 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:42,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544878281] [2021-05-06 08:07:42,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544878281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:42,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:42,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:07:42,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759135333] [2021-05-06 08:07:42,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:07:42,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:42,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:07:42,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:07:42,995 INFO L87 Difference]: Start difference. First operand 217 states and 271 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:07:43,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:43,047 INFO L93 Difference]: Finished difference Result 243 states and 293 transitions. [2021-05-06 08:07:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:07:43,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-06 08:07:43,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:43,048 INFO L225 Difference]: With dead ends: 243 [2021-05-06 08:07:43,048 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 08:07:43,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:07:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 08:07:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-05-06 08:07:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 152 states have internal predecessors, (165), 57 states have call successors, (57), 30 states have call predecessors, (57), 29 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 08:07:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2021-05-06 08:07:43,053 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 80 [2021-05-06 08:07:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:43,053 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2021-05-06 08:07:43,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:07:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2021-05-06 08:07:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:07:43,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:43,054 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:07:43,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:43,269 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:43,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1875056275, now seen corresponding path program 5 times [2021-05-06 08:07:43,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:43,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964220077] [2021-05-06 08:07:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:43,274 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:43,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012599969] [2021-05-06 08:07:43,274 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 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 08:07:43,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:07:43,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:43,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:07:43,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:43,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-06 08:07:43,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:43,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964220077] [2021-05-06 08:07:43,754 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:43,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012599969] [2021-05-06 08:07:43,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012599969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:43,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:43,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:07:43,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824454287] [2021-05-06 08:07:43,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:07:43,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:43,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:07:43,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:07:43,756 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 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 08:07:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:43,810 INFO L93 Difference]: Finished difference Result 264 states and 326 transitions. [2021-05-06 08:07:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:07:43,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 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 80 [2021-05-06 08:07:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:43,811 INFO L225 Difference]: With dead ends: 264 [2021-05-06 08:07:43,812 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 08:07:43,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:07:43,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 08:07:43,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 250. [2021-05-06 08:07:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 163 states have internal predecessors, (177), 67 states have call successors, (67), 31 states have call predecessors, (67), 30 states have return successors, (63), 55 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 08:07:43,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2021-05-06 08:07:43,817 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 80 [2021-05-06 08:07:43,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:43,817 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2021-05-06 08:07:43,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 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 08:07:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2021-05-06 08:07:43,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:07:43,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:43,818 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:07:44,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:44,024 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:44,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:44,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1563427147, now seen corresponding path program 6 times [2021-05-06 08:07:44,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:44,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267016724] [2021-05-06 08:07:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:44,029 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:44,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760063889] [2021-05-06 08:07:44,029 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 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 08:07:44,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 08:07:44,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:44,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:07:44,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:44,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:44,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:44,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:44,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:44,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:44,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:44,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 52 proven. 7 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-05-06 08:07:44,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:44,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267016724] [2021-05-06 08:07:44,217 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:44,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760063889] [2021-05-06 08:07:44,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760063889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:44,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:44,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:07:44,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831812153] [2021-05-06 08:07:44,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:07:44,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:44,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:07:44,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:07:44,218 INFO L87 Difference]: Start difference. First operand 250 states and 307 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:07:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:44,276 INFO L93 Difference]: Finished difference Result 254 states and 310 transitions. [2021-05-06 08:07:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:07:44,276 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), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 80 [2021-05-06 08:07:44,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:44,277 INFO L225 Difference]: With dead ends: 254 [2021-05-06 08:07:44,277 INFO L226 Difference]: Without dead ends: 251 [2021-05-06 08:07:44,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:07:44,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-06 08:07:44,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 249. [2021-05-06 08:07:44,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 155 states have (on average 1.1548387096774193) internal successors, (179), 164 states have internal predecessors, (179), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:07:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2021-05-06 08:07:44,283 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 80 [2021-05-06 08:07:44,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:44,283 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2021-05-06 08:07:44,283 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), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:07:44,283 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2021-05-06 08:07:44,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:07:44,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:44,284 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:07:44,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:44,505 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:44,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:44,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1072579442, now seen corresponding path program 3 times [2021-05-06 08:07:44,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:44,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39851438] [2021-05-06 08:07:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:44,510 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:44,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707540059] [2021-05-06 08:07:44,510 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 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 08:07:44,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:07:44,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:44,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:07:44,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:44,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 08:07:44,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:44,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39851438] [2021-05-06 08:07:44,778 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:44,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707540059] [2021-05-06 08:07:44,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707540059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:44,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:44,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:07:44,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235551404] [2021-05-06 08:07:44,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:07:44,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:44,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:07:44,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:07:44,779 INFO L87 Difference]: Start difference. First operand 249 states and 300 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:07:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:45,090 INFO L93 Difference]: Finished difference Result 284 states and 356 transitions. [2021-05-06 08:07:45,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:07:45,092 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 08:07:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:45,094 INFO L225 Difference]: With dead ends: 284 [2021-05-06 08:07:45,094 INFO L226 Difference]: Without dead ends: 284 [2021-05-06 08:07:45,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:07:45,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-06 08:07:45,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2021-05-06 08:07:45,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 162 states have (on average 1.1604938271604939) internal successors, (188), 171 states have internal predecessors, (188), 65 states have call successors, (65), 33 states have call predecessors, (65), 32 states have return successors, (62), 55 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:07:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2021-05-06 08:07:45,100 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 85 [2021-05-06 08:07:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:45,100 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2021-05-06 08:07:45,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:07:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2021-05-06 08:07:45,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:07:45,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:45,101 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 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] [2021-05-06 08:07:45,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:07:45,320 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:45,321 INFO L82 PathProgramCache]: Analyzing trace with hash -721779505, now seen corresponding path program 7 times [2021-05-06 08:07:45,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:45,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707963053] [2021-05-06 08:07:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:45,326 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:45,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498244867] [2021-05-06 08:07:45,326 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 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 08:07:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:07:45,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 08:07:45,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:45,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 08:07:45,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:45,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707963053] [2021-05-06 08:07:45,614 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:45,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498244867] [2021-05-06 08:07:45,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498244867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:45,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:45,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:07:45,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008140532] [2021-05-06 08:07:45,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:07:45,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:45,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:07:45,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:07:45,615 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:07:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:46,218 INFO L93 Difference]: Finished difference Result 306 states and 374 transitions. [2021-05-06 08:07:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:07:46,218 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 08:07:46,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:46,221 INFO L225 Difference]: With dead ends: 306 [2021-05-06 08:07:46,221 INFO L226 Difference]: Without dead ends: 306 [2021-05-06 08:07:46,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:07:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-06 08:07:46,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2021-05-06 08:07:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 189 states have (on average 1.164021164021164) internal successors, (220), 198 states have internal predecessors, (220), 74 states have call successors, (74), 38 states have call predecessors, (74), 37 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 08:07:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 365 transitions. [2021-05-06 08:07:46,227 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 365 transitions. Word has length 85 [2021-05-06 08:07:46,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:46,227 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 365 transitions. [2021-05-06 08:07:46,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:07:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 365 transitions. [2021-05-06 08:07:46,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:07:46,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:46,229 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 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] [2021-05-06 08:07:46,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:07:46,445 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:46,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1313119571, now seen corresponding path program 8 times [2021-05-06 08:07:46,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:46,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173392853] [2021-05-06 08:07:46,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:46,457 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:46,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682186058] [2021-05-06 08:07:46,458 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 08:07:46,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:07:46,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:46,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 08:07:46,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:46,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:46,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:46,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 59 proven. 57 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-06 08:07:46,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:46,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173392853] [2021-05-06 08:07:46,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:46,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682186058] [2021-05-06 08:07:46,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682186058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:46,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:46,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:07:46,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735797648] [2021-05-06 08:07:46,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:07:46,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:46,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:07:46,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:07:46,743 INFO L87 Difference]: Start difference. First operand 301 states and 365 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:07:47,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:47,168 INFO L93 Difference]: Finished difference Result 328 states and 404 transitions. [2021-05-06 08:07:47,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:07:47,168 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 08:07:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:47,170 INFO L225 Difference]: With dead ends: 328 [2021-05-06 08:07:47,170 INFO L226 Difference]: Without dead ends: 328 [2021-05-06 08:07:47,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:07:47,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-06 08:07:47,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 282. [2021-05-06 08:07:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 176 states have (on average 1.1704545454545454) internal successors, (206), 185 states have internal predecessors, (206), 71 states have call successors, (71), 35 states have call predecessors, (71), 34 states have return successors, (68), 61 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-06 08:07:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2021-05-06 08:07:47,176 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 85 [2021-05-06 08:07:47,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:47,176 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2021-05-06 08:07:47,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:07:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2021-05-06 08:07:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:07:47,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:47,177 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 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] [2021-05-06 08:07:47,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:47,391 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:47,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:47,391 INFO L82 PathProgramCache]: Analyzing trace with hash -962319634, now seen corresponding path program 9 times [2021-05-06 08:07:47,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:47,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804365937] [2021-05-06 08:07:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:47,396 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:47,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664422012] [2021-05-06 08:07:47,397 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 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 08:07:47,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:07:47,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:47,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 08:07:47,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:47,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 70 proven. 14 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-06 08:07:47,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:47,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804365937] [2021-05-06 08:07:47,630 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:47,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664422012] [2021-05-06 08:07:47,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664422012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:47,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:47,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:07:47,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912446593] [2021-05-06 08:07:47,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:07:47,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:47,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:07:47,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:07:47,632 INFO L87 Difference]: Start difference. First operand 282 states and 345 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:07:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:48,069 INFO L93 Difference]: Finished difference Result 344 states and 439 transitions. [2021-05-06 08:07:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:07:48,070 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 85 [2021-05-06 08:07:48,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:48,071 INFO L225 Difference]: With dead ends: 344 [2021-05-06 08:07:48,071 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 08:07:48,072 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:07:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 08:07:48,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 298. [2021-05-06 08:07:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 185 states have (on average 1.1675675675675676) internal successors, (216), 195 states have internal predecessors, (216), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:07:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 364 transitions. [2021-05-06 08:07:48,084 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 364 transitions. Word has length 85 [2021-05-06 08:07:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:48,085 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 364 transitions. [2021-05-06 08:07:48,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:07:48,086 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 364 transitions. [2021-05-06 08:07:48,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:07:48,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:48,086 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:07:48,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:07:48,297 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:48,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:48,297 INFO L82 PathProgramCache]: Analyzing trace with hash -201025847, now seen corresponding path program 10 times [2021-05-06 08:07:48,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:48,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739689679] [2021-05-06 08:07:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:48,302 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:48,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576504165] [2021-05-06 08:07:48,302 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 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 08:07:48,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:07:48,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:48,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 08:07:48,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:48,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:48,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:48,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:48,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:48,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:48,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:48,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:48,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:48,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:48,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:48,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:48,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:48,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 27 proven. 61 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-05-06 08:07:48,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:48,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739689679] [2021-05-06 08:07:48,608 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:48,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576504165] [2021-05-06 08:07:48,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576504165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:48,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:48,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:07:48,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257516264] [2021-05-06 08:07:48,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:07:48,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:48,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:07:48,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:07:48,611 INFO L87 Difference]: Start difference. First operand 298 states and 364 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:07:49,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:49,269 INFO L93 Difference]: Finished difference Result 323 states and 407 transitions. [2021-05-06 08:07:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:07:49,269 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 08:07:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:49,270 INFO L225 Difference]: With dead ends: 323 [2021-05-06 08:07:49,270 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 08:07:49,270 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:07:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 08:07:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 314. [2021-05-06 08:07:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 194 states have (on average 1.175257731958763) internal successors, (228), 204 states have internal predecessors, (228), 82 states have call successors, (82), 38 states have call predecessors, (82), 37 states have return successors, (78), 71 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-06 08:07:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 388 transitions. [2021-05-06 08:07:49,276 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 388 transitions. Word has length 90 [2021-05-06 08:07:49,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:49,277 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 388 transitions. [2021-05-06 08:07:49,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:07:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 388 transitions. [2021-05-06 08:07:49,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:07:49,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:49,277 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:07:49,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:07:49,493 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:49,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:49,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1749274408, now seen corresponding path program 11 times [2021-05-06 08:07:49,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:49,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878742215] [2021-05-06 08:07:49,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:49,497 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:49,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279911305] [2021-05-06 08:07:49,498 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 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 08:07:50,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:07:50,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:50,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:07:50,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:50,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 08:07:50,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:50,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878742215] [2021-05-06 08:07:50,862 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:50,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279911305] [2021-05-06 08:07:50,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279911305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:50,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:50,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:07:50,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051945197] [2021-05-06 08:07:50,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:07:50,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:50,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:07:50,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:07:50,863 INFO L87 Difference]: Start difference. First operand 314 states and 388 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:07:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:07:51,295 INFO L93 Difference]: Finished difference Result 357 states and 447 transitions. [2021-05-06 08:07:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:07:51,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 08:07:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:07:51,306 INFO L225 Difference]: With dead ends: 357 [2021-05-06 08:07:51,306 INFO L226 Difference]: Without dead ends: 353 [2021-05-06 08:07:51,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:07:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-06 08:07:51,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 337. [2021-05-06 08:07:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 209 states have (on average 1.167464114832536) internal successors, (244), 220 states have internal predecessors, (244), 87 states have call successors, (87), 41 states have call predecessors, (87), 40 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:07:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 414 transitions. [2021-05-06 08:07:51,313 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 414 transitions. Word has length 90 [2021-05-06 08:07:51,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:07:51,313 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 414 transitions. [2021-05-06 08:07:51,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:07:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 414 transitions. [2021-05-06 08:07:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:07:51,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:07:51,314 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:07:51,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:07:51,520 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:07:51,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:07:51,521 INFO L82 PathProgramCache]: Analyzing trace with hash 492366858, now seen corresponding path program 12 times [2021-05-06 08:07:51,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:07:51,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211933254] [2021-05-06 08:07:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:07:51,525 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:07:51,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598246451] [2021-05-06 08:07:51,525 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 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 08:07:51,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:07:51,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:07:51,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:07:51,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:07:51,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:51,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:51,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:51,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:58,932 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-06 08:07:58,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:58,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:58,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:07:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-06 08:07:58,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:07:58,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211933254] [2021-05-06 08:07:58,991 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:07:58,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598246451] [2021-05-06 08:07:58,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598246451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:07:58,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:07:58,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:07:58,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126364996] [2021-05-06 08:07:58,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:07:58,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:07:58,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:07:58,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:07:58,993 INFO L87 Difference]: Start difference. First operand 337 states and 414 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:09:09,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:09:09,766 INFO L93 Difference]: Finished difference Result 399 states and 510 transitions. [2021-05-06 08:09:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:09:09,768 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 90 [2021-05-06 08:09:09,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:09:09,769 INFO L225 Difference]: With dead ends: 399 [2021-05-06 08:09:09,769 INFO L226 Difference]: Without dead ends: 383 [2021-05-06 08:09:09,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 7238.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:09:09,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-06 08:09:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 374. [2021-05-06 08:09:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 234 states have (on average 1.1837606837606838) internal successors, (277), 243 states have internal predecessors, (277), 97 states have call successors, (97), 43 states have call predecessors, (97), 42 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 08:09:09,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 467 transitions. [2021-05-06 08:09:09,797 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 467 transitions. Word has length 90 [2021-05-06 08:09:09,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:09:09,798 INFO L480 AbstractCegarLoop]: Abstraction has 374 states and 467 transitions. [2021-05-06 08:09:09,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:09:09,798 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 467 transitions. [2021-05-06 08:09:09,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 08:09:09,799 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:09:09,799 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:09:10,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:09:10,017 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:09:10,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:09:10,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1503864962, now seen corresponding path program 4 times [2021-05-06 08:09:10,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:09:10,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012997383] [2021-05-06 08:09:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:09:10,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:09:10,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558483921] [2021-05-06 08:09:10,022 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 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 08:09:10,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:09:10,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:09:10,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:09:10,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:09:10,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:09:10,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:09:10,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012997383] [2021-05-06 08:09:10,318 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:09:10,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558483921] [2021-05-06 08:09:10,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558483921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:09:10,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:09:10,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:09:10,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90007629] [2021-05-06 08:09:10,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:09:10,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:09:10,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:09:10,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:09:10,319 INFO L87 Difference]: Start difference. First operand 374 states and 467 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:09:11,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:09:11,472 INFO L93 Difference]: Finished difference Result 460 states and 546 transitions. [2021-05-06 08:09:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:09:11,473 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), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2021-05-06 08:09:11,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:09:11,474 INFO L225 Difference]: With dead ends: 460 [2021-05-06 08:09:11,474 INFO L226 Difference]: Without dead ends: 460 [2021-05-06 08:09:11,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:09:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-06 08:09:11,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 432. [2021-05-06 08:09:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 280 states have (on average 1.1392857142857142) internal successors, (319), 290 states have internal predecessors, (319), 97 states have call successors, (97), 55 states have call predecessors, (97), 54 states have return successors, (93), 86 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 08:09:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 509 transitions. [2021-05-06 08:09:11,483 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 509 transitions. Word has length 99 [2021-05-06 08:09:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:09:11,483 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 509 transitions. [2021-05-06 08:09:11,484 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), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:09:11,484 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 509 transitions. [2021-05-06 08:09:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:09:11,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:09:11,485 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:09:11,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:09:11,702 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:09:11,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:09:11,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1826743324, now seen corresponding path program 4 times [2021-05-06 08:09:11,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:09:11,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777354792] [2021-05-06 08:09:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:09:11,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:09:11,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040960379] [2021-05-06 08:09:11,706 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 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 08:09:11,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:09:11,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:09:11,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 08:09:11,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:09:11,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:11,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 70 proven. 122 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-05-06 08:09:12,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:09:12,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777354792] [2021-05-06 08:09:12,406 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:09:12,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040960379] [2021-05-06 08:09:12,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040960379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:09:12,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:09:12,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:09:12,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446496409] [2021-05-06 08:09:12,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:09:12,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:09:12,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:09:12,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:09:12,408 INFO L87 Difference]: Start difference. First operand 432 states and 509 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 08:09:13,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:09:13,466 INFO L93 Difference]: Finished difference Result 467 states and 565 transitions. [2021-05-06 08:09:13,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:09:13,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2021-05-06 08:09:13,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:09:13,468 INFO L225 Difference]: With dead ends: 467 [2021-05-06 08:09:13,468 INFO L226 Difference]: Without dead ends: 467 [2021-05-06 08:09:13,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:09:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-06 08:09:13,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 443. [2021-05-06 08:09:13,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 287 states have (on average 1.1428571428571428) internal successors, (328), 297 states have internal predecessors, (328), 100 states have call successors, (100), 56 states have call predecessors, (100), 55 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2021-05-06 08:09:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 524 transitions. [2021-05-06 08:09:13,476 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 524 transitions. Word has length 104 [2021-05-06 08:09:13,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:09:13,476 INFO L480 AbstractCegarLoop]: Abstraction has 443 states and 524 transitions. [2021-05-06 08:09:13,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 08:09:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 524 transitions. [2021-05-06 08:09:13,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:09:13,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:09:13,477 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:09:13,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:09:13,693 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:09:13,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:09:13,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2117424035, now seen corresponding path program 13 times [2021-05-06 08:09:13,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:09:13,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828053848] [2021-05-06 08:09:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:09:13,698 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:09:13,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495657775] [2021-05-06 08:09:13,699 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 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 08:09:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:09:13,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 08:09:13,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:09:13,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:13,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:13,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:13,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:13,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:13,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:14,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:14,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:14,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:14,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:14,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:14,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:14,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:14,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:14,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:14,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:14,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-05-06 08:09:14,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:09:14,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828053848] [2021-05-06 08:09:14,199 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:09:14,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495657775] [2021-05-06 08:09:14,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495657775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:09:14,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:09:14,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:09:14,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139708744] [2021-05-06 08:09:14,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:09:14,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:09:14,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:09:14,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:09:14,200 INFO L87 Difference]: Start difference. First operand 443 states and 524 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:09:14,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:09:14,771 INFO L93 Difference]: Finished difference Result 470 states and 563 transitions. [2021-05-06 08:09:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:09:14,772 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 08:09:14,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:09:14,773 INFO L225 Difference]: With dead ends: 470 [2021-05-06 08:09:14,773 INFO L226 Difference]: Without dead ends: 470 [2021-05-06 08:09:14,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:09:14,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-06 08:09:14,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 454. [2021-05-06 08:09:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 294 states have (on average 1.1428571428571428) internal successors, (336), 304 states have internal predecessors, (336), 103 states have call successors, (103), 57 states have call predecessors, (103), 56 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-06 08:09:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 538 transitions. [2021-05-06 08:09:14,780 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 538 transitions. Word has length 104 [2021-05-06 08:09:14,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:09:14,788 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 538 transitions. [2021-05-06 08:09:14,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:09:14,788 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 538 transitions. [2021-05-06 08:09:14,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:09:14,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:09:14,793 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:09:15,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 08:09:15,011 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:09:15,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:09:15,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1586203195, now seen corresponding path program 14 times [2021-05-06 08:09:15,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:09:15,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130896767] [2021-05-06 08:09:15,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:09:15,016 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:09:15,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968625757] [2021-05-06 08:09:15,017 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 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 08:09:15,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:09:15,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:09:15,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 08:09:15,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:09:15,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:15,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:15,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:15,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:15,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:15,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 84 proven. 66 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-05-06 08:09:15,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:09:15,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130896767] [2021-05-06 08:09:15,516 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:09:15,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968625757] [2021-05-06 08:09:15,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968625757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:09:15,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:09:15,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:09:15,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097485273] [2021-05-06 08:09:15,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:09:15,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:09:15,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:09:15,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:09:15,527 INFO L87 Difference]: Start difference. First operand 454 states and 538 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:09:16,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:09:16,800 INFO L93 Difference]: Finished difference Result 495 states and 589 transitions. [2021-05-06 08:09:16,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:09:16,801 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 08:09:16,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:09:16,802 INFO L225 Difference]: With dead ends: 495 [2021-05-06 08:09:16,802 INFO L226 Difference]: Without dead ends: 495 [2021-05-06 08:09:16,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:09:16,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-06 08:09:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 460. [2021-05-06 08:09:16,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 300 states have (on average 1.1433333333333333) internal successors, (343), 308 states have internal predecessors, (343), 101 states have call successors, (101), 59 states have call predecessors, (101), 58 states have return successors, (97), 92 states have call predecessors, (97), 97 states have call successors, (97) [2021-05-06 08:09:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 541 transitions. [2021-05-06 08:09:16,822 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 541 transitions. Word has length 104 [2021-05-06 08:09:16,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:09:16,822 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 541 transitions. [2021-05-06 08:09:16,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:09:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 541 transitions. [2021-05-06 08:09:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:09:16,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:09:16,823 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:09:17,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:09:17,049 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:09:17,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:09:17,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1937003132, now seen corresponding path program 15 times [2021-05-06 08:09:17,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:09:17,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293336494] [2021-05-06 08:09:17,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:09:17,054 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:09:17,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79506953] [2021-05-06 08:09:17,054 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 08:09:17,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:09:17,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:09:17,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 08:09:17,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:09:17,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:17,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:18,546 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-06 08:09:18,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:18,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:36,590 WARN L205 SmtUtils]: Spent 14.16 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-06 08:09:37,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:09:37,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:58,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,093 WARN L159 QuantifierPusher]: Ignoring assumption.