/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/hard2_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:15:13,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:15:13,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:15:13,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 09:15:13,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 09:15:13,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 09:15:13,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 09:15:13,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 09:15:13,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 09:15:13,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 09:15:13,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 09:15:13,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 09:15:13,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:15:13,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:15:13,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:15:13,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:15:13,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:15:13,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:15:13,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:15:13,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:15:13,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:15:13,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:15:13,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:15:13,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:15:13,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:15:13,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:15:13,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:15:13,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:15:13,141 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:15:13,149 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:15:13,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:15:13,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:15:13,150 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:15:13,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:15:13,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:15:13,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:15:13,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:15:13,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:15:13,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:15:13,151 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:15:13,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:15:13,152 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:15:13,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:15:13,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:15:13,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:15:13,152 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:15:13,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:15:13,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:15:13,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:15:13,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:15:13,160 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:15:13,160 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:15:13,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:15:13,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:15:13,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:15:13,466 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:15:13,467 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:15:13,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound20.c [2021-05-06 09:15:13,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06f204332/83a19b3948e841cf868605d626cab7ee/FLAG8729e00cb [2021-05-06 09:15:13,888 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:15:13,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound20.c [2021-05-06 09:15:13,893 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06f204332/83a19b3948e841cf868605d626cab7ee/FLAG8729e00cb [2021-05-06 09:15:13,909 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06f204332/83a19b3948e841cf868605d626cab7ee [2021-05-06 09:15:13,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:15:13,913 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:15:13,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:15:13,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:15:13,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:15:13,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:15:13" (1/1) ... [2021-05-06 09:15:13,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5757bebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:13, skipping insertion in model container [2021-05-06 09:15:13,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:15:13" (1/1) ... [2021-05-06 09:15:13,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:15:13,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:15:14,074 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/hard2_valuebound20.c[526,539] [2021-05-06 09:15:14,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:15:14,098 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:15:14,109 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/hard2_valuebound20.c[526,539] [2021-05-06 09:15:14,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:15:14,131 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:15:14,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:14 WrapperNode [2021-05-06 09:15:14,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:15:14,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:15:14,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:15:14,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:15:14,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:14" (1/1) ... [2021-05-06 09:15:14,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:14" (1/1) ... [2021-05-06 09:15:14,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:14" (1/1) ... [2021-05-06 09:15:14,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:14" (1/1) ... [2021-05-06 09:15:14,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:14" (1/1) ... [2021-05-06 09:15:14,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:14" (1/1) ... [2021-05-06 09:15:14,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:14" (1/1) ... [2021-05-06 09:15:14,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:15:14,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:15:14,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:15:14,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:15:14,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:14" (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 09:15:14,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:15:14,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:15:14,250 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:15:14,250 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:15:14,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:15:14,251 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:15:14,251 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:15:14,251 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:15:14,251 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:15:14,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:15:14,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:15:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:15:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:15:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:15:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:15:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:15:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:15:14,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:15:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:15:14,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:15:14,518 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:15:14,519 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:15:14,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:15:14 BoogieIcfgContainer [2021-05-06 09:15:14,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:15:14,532 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:15:14,532 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:15:14,532 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:15:14,534 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:15:14" (1/1) ... [2021-05-06 09:15:14,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:15:14 BasicIcfg [2021-05-06 09:15:14,567 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:15:14,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:15:14,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:15:14,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:15:14,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:15:13" (1/4) ... [2021-05-06 09:15:14,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658f1db6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:15:14, skipping insertion in model container [2021-05-06 09:15:14,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:15:14" (2/4) ... [2021-05-06 09:15:14,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658f1db6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:15:14, skipping insertion in model container [2021-05-06 09:15:14,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:15:14" (3/4) ... [2021-05-06 09:15:14,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@658f1db6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:15:14, skipping insertion in model container [2021-05-06 09:15:14,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:15:14" (4/4) ... [2021-05-06 09:15:14,573 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound20.cJordan [2021-05-06 09:15:14,576 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:15:14,579 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:15:14,591 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:15:14,613 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:15:14,613 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:15:14,613 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:15:14,613 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:15:14,613 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:15:14,614 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:15:14,614 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:15:14,614 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:15:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:15:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:15:14,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:14,634 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:14,634 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:14,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:14,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2021-05-06 09:15:14,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:14,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887681987] [2021-05-06 09:15:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:14,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:15:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:14,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:15:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:15:14,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:14,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887681987] [2021-05-06 09:15:14,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887681987] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:15:14,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:15:14,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:15:14,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216638135] [2021-05-06 09:15:14,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:15:14,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:14,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:15:14,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:15:14,883 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:15:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:14,972 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-05-06 09:15:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:15:14,975 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 09:15:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:14,980 INFO L225 Difference]: With dead ends: 35 [2021-05-06 09:15:14,980 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 09:15:14,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:15:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 09:15:15,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 09:15:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:15:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-06 09:15:15,013 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-06 09:15:15,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:15,013 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-06 09:15:15,013 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:15:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-06 09:15:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:15:15,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:15,015 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:15,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:15:15,015 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:15,016 INFO L82 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2021-05-06 09:15:15,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:15,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932055135] [2021-05-06 09:15:15,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:15,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:15:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:15,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:15:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:15:15,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:15,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932055135] [2021-05-06 09:15:15,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932055135] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:15:15,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:15:15,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:15:15,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567602451] [2021-05-06 09:15:15,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:15:15,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:15,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:15:15,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:15:15,185 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:15:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:15,533 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-05-06 09:15:15,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:15:15,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 09:15:15,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:15,544 INFO L225 Difference]: With dead ends: 41 [2021-05-06 09:15:15,544 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 09:15:15,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:15:15,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 09:15:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-06 09:15:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:15:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-06 09:15:15,551 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-06 09:15:15,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:15,554 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-06 09:15:15,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:15:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-06 09:15:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 09:15:15,555 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:15,555 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:15,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:15:15,555 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:15,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:15,556 INFO L82 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2021-05-06 09:15:15,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:15,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137601172] [2021-05-06 09:15:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:15,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:15:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:15,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:15:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:15,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 09:15:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:15:15,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:15,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137601172] [2021-05-06 09:15:15,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137601172] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:15:15,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:15:15,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:15:15,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27027201] [2021-05-06 09:15:15,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:15:15,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:15,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:15:15,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:15:15,696 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:15:15,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:15,953 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-06 09:15:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:15:15,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 09:15:15,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:15,954 INFO L225 Difference]: With dead ends: 45 [2021-05-06 09:15:15,954 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 09:15:15,954 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:15:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 09:15:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-06 09:15:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:15:15,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 09:15:15,959 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-06 09:15:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:15,959 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 09:15:15,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:15:15,960 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 09:15:15,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:15:15,960 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:15,960 INFO L523 BasicCegarLoop]: trace histogram [3, 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 09:15:15,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:15:15,961 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:15,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2021-05-06 09:15:15,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:15,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204649610] [2021-05-06 09:15:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:15,969 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:15,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68359433] [2021-05-06 09:15:15,970 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 09:15:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:16,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:15:16,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:16,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:15:16,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:16,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204649610] [2021-05-06 09:15:16,188 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:16,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68359433] [2021-05-06 09:15:16,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68359433] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:15:16,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:15:16,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:15:16,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359950554] [2021-05-06 09:15:16,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:15:16,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:16,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:15:16,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:15:16,190 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:15:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:16,228 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2021-05-06 09:15:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:15:16,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 09:15:16,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:16,229 INFO L225 Difference]: With dead ends: 53 [2021-05-06 09:15:16,229 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 09:15:16,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:15:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 09:15:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 09:15:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 09:15:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-05-06 09:15:16,234 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2021-05-06 09:15:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:16,235 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-05-06 09:15:16,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:15:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-05-06 09:15:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 09:15:16,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:16,236 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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 09:15:16,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:16,453 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:16,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2021-05-06 09:15:16,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:16,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968543374] [2021-05-06 09:15:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:16,461 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:16,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858345670] [2021-05-06 09:15:16,462 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 09:15:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:16,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:15:16,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:16,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:15:16,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:16,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968543374] [2021-05-06 09:15:16,696 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:16,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858345670] [2021-05-06 09:15:16,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858345670] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:15:16,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:15:16,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:15:16,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620800261] [2021-05-06 09:15:16,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:15:16,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:16,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:15:16,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:15:16,697 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 09:15:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:16,754 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-05-06 09:15:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:15:16,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 34 [2021-05-06 09:15:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:16,757 INFO L225 Difference]: With dead ends: 63 [2021-05-06 09:15:16,757 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 09:15:16,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:15:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 09:15:16,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 09:15:16,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 09:15:16,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-05-06 09:15:16,769 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2021-05-06 09:15:16,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:16,769 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-05-06 09:15:16,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 09:15:16,769 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-05-06 09:15:16,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 09:15:16,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:16,770 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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 09:15:16,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:16,993 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:16,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:16,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2021-05-06 09:15:16,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:16,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128818587] [2021-05-06 09:15:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:17,002 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:17,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541763518] [2021-05-06 09:15:17,003 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 09:15:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:17,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:15:17,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:17,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 09:15:17,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:17,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128818587] [2021-05-06 09:15:17,230 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:17,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541763518] [2021-05-06 09:15:17,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541763518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:17,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:17,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:15:17,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722999176] [2021-05-06 09:15:17,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:15:17,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:17,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:15:17,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:15:17,231 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:15:17,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:17,302 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-06 09:15:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:15:17,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 09:15:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:17,305 INFO L225 Difference]: With dead ends: 82 [2021-05-06 09:15:17,305 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 09:15:17,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:15:17,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 09:15:17,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 09:15:17,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 09:15:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2021-05-06 09:15:17,310 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 44 [2021-05-06 09:15:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:17,311 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2021-05-06 09:15:17,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:15:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2021-05-06 09:15:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 09:15:17,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:17,312 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:17,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:17,533 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:17,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:17,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1665528729, now seen corresponding path program 2 times [2021-05-06 09:15:17,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:17,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238686810] [2021-05-06 09:15:17,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:17,540 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:17,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4438568] [2021-05-06 09:15:17,540 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 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 09:15:17,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:15:17,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:15:17,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 09:15:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:17,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 09:15:17,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:17,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238686810] [2021-05-06 09:15:17,731 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:17,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4438568] [2021-05-06 09:15:17,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4438568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:17,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:17,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:15:17,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940382956] [2021-05-06 09:15:17,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:15:17,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:17,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:15:17,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:15:17,733 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 09:15:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:17,841 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2021-05-06 09:15:17,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:15:17,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 61 [2021-05-06 09:15:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:17,842 INFO L225 Difference]: With dead ends: 111 [2021-05-06 09:15:17,842 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 09:15:17,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:15:17,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 09:15:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 09:15:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 62 states have internal predecessors, (68), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:15:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2021-05-06 09:15:17,849 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 61 [2021-05-06 09:15:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:17,849 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2021-05-06 09:15:17,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 09:15:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2021-05-06 09:15:17,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 09:15:17,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:17,850 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:18,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:18,069 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:18,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1382136022, now seen corresponding path program 1 times [2021-05-06 09:15:18,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:18,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282987270] [2021-05-06 09:15:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:18,076 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:18,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726248838] [2021-05-06 09:15:18,076 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 09:15:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:18,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 09:15:18,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:18,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 09:15:18,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:18,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282987270] [2021-05-06 09:15:18,344 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:18,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726248838] [2021-05-06 09:15:18,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726248838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:18,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:18,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:15:18,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637022690] [2021-05-06 09:15:18,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:15:18,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:18,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:15:18,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:15:18,346 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 09:15:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:18,425 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2021-05-06 09:15:18,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:15:18,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2021-05-06 09:15:18,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:18,426 INFO L225 Difference]: With dead ends: 125 [2021-05-06 09:15:18,427 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 09:15:18,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:15:18,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 09:15:18,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-06 09:15:18,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 77 states have internal predecessors, (83), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:15:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2021-05-06 09:15:18,434 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 64 [2021-05-06 09:15:18,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:18,434 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2021-05-06 09:15:18,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 09:15:18,434 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2021-05-06 09:15:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 09:15:18,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:18,435 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:18,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:18,655 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:18,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:18,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1085940318, now seen corresponding path program 1 times [2021-05-06 09:15:18,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:18,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732705875] [2021-05-06 09:15:18,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:18,662 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:18,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999966840] [2021-05-06 09:15:18,662 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 09:15:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:18,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 09:15:18,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:18,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 09:15:18,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:18,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732705875] [2021-05-06 09:15:18,904 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:18,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999966840] [2021-05-06 09:15:18,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999966840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:18,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:18,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:15:18,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947756392] [2021-05-06 09:15:18,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:15:18,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:18,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:15:18,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:15:18,905 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 09:15:18,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:18,979 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2021-05-06 09:15:18,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:15:18,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 09:15:18,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:18,980 INFO L225 Difference]: With dead ends: 129 [2021-05-06 09:15:18,980 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 09:15:18,980 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:15:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 09:15:18,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 09:15:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 09:15:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 09:15:18,985 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 75 [2021-05-06 09:15:18,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:18,986 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 09:15:18,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 09:15:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 09:15:18,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 09:15:18,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:18,987 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:19,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:19,206 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:19,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:19,206 INFO L82 PathProgramCache]: Analyzing trace with hash -273867048, now seen corresponding path program 3 times [2021-05-06 09:15:19,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:19,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587425269] [2021-05-06 09:15:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:19,212 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:19,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713381109] [2021-05-06 09:15:19,212 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 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 09:15:19,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 09:15:19,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:15:19,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 09:15:19,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:19,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:19,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:19,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 59 proven. 7 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-05-06 09:15:19,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:19,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587425269] [2021-05-06 09:15:19,424 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:19,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713381109] [2021-05-06 09:15:19,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713381109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:19,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:19,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:15:19,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140119060] [2021-05-06 09:15:19,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:15:19,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:19,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:15:19,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:15:19,425 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 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 09:15:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:19,522 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-06 09:15:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:15:19,522 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 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 78 [2021-05-06 09:15:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:19,523 INFO L225 Difference]: With dead ends: 111 [2021-05-06 09:15:19,523 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 09:15:19,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:15:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 09:15:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 09:15:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 68 states have internal predecessors, (74), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 09:15:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2021-05-06 09:15:19,529 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 78 [2021-05-06 09:15:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:19,529 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2021-05-06 09:15:19,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 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 09:15:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2021-05-06 09:15:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 09:15:19,530 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:19,530 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 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, 1, 1, 1, 1, 1] [2021-05-06 09:15:19,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 09:15:19,749 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:19,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1708305639, now seen corresponding path program 2 times [2021-05-06 09:15:19,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:19,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099615426] [2021-05-06 09:15:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:19,755 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:19,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614134977] [2021-05-06 09:15:19,755 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 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 09:15:19,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:15:19,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:15:19,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 09:15:19,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:19,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 09:15:19,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:19,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099615426] [2021-05-06 09:15:19,968 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:19,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614134977] [2021-05-06 09:15:19,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614134977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:19,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:19,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:15:19,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86660522] [2021-05-06 09:15:19,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:15:19,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:19,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:15:19,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:15:19,969 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 09:15:20,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:20,095 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2021-05-06 09:15:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:15:20,096 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), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2021-05-06 09:15:20,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:20,097 INFO L225 Difference]: With dead ends: 136 [2021-05-06 09:15:20,097 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 09:15:20,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:15:20,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 09:15:20,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 09:15:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 85 states have internal predecessors, (90), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 09:15:20,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2021-05-06 09:15:20,102 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 81 [2021-05-06 09:15:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:20,102 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2021-05-06 09:15:20,102 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), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 09:15:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2021-05-06 09:15:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:15:20,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:20,103 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:20,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 09:15:20,322 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:20,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:20,322 INFO L82 PathProgramCache]: Analyzing trace with hash -233495842, now seen corresponding path program 3 times [2021-05-06 09:15:20,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:20,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078170330] [2021-05-06 09:15:20,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:20,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:20,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250032092] [2021-05-06 09:15:20,328 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 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 09:15:20,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:15:20,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:15:20,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 09:15:20,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:20,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 09:15:20,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:20,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078170330] [2021-05-06 09:15:20,716 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:20,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250032092] [2021-05-06 09:15:20,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250032092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:20,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:20,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:15:20,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498477039] [2021-05-06 09:15:20,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:15:20,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:20,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:15:20,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:15:20,718 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:15:20,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:20,890 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2021-05-06 09:15:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:15:20,891 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 09:15:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:20,894 INFO L225 Difference]: With dead ends: 149 [2021-05-06 09:15:20,894 INFO L226 Difference]: Without dead ends: 144 [2021-05-06 09:15:20,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:15:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-06 09:15:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-05-06 09:15:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 91 states have internal predecessors, (95), 34 states have call successors, (34), 20 states have call predecessors, (34), 19 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 09:15:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-05-06 09:15:20,901 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 94 [2021-05-06 09:15:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:20,901 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-05-06 09:15:20,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:15:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-05-06 09:15:20,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:15:20,902 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:20,902 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:21,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:21,103 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:21,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1077967713, now seen corresponding path program 1 times [2021-05-06 09:15:21,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:21,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116403153] [2021-05-06 09:15:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:21,110 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:21,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111309404] [2021-05-06 09:15:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:15:21,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 09:15:21,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:21,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-05-06 09:15:21,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:21,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116403153] [2021-05-06 09:15:21,480 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:21,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111309404] [2021-05-06 09:15:21,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111309404] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:15:21,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:15:21,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:15:21,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729976158] [2021-05-06 09:15:21,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:15:21,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:21,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:15:21,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:15:21,481 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:15:21,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:21,569 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2021-05-06 09:15:21,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:15:21,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 09:15:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:21,570 INFO L225 Difference]: With dead ends: 142 [2021-05-06 09:15:21,570 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 09:15:21,570 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:15:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 09:15:21,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2021-05-06 09:15:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 09:15:21,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2021-05-06 09:15:21,574 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 94 [2021-05-06 09:15:21,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:21,575 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2021-05-06 09:15:21,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:15:21,575 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2021-05-06 09:15:21,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 09:15:21,575 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:21,575 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 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 09:15:21,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:21,789 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:21,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:21,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1181205258, now seen corresponding path program 4 times [2021-05-06 09:15:21,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:21,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875505934] [2021-05-06 09:15:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:21,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:21,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591500781] [2021-05-06 09:15:21,796 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 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 09:15:21,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:15:21,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:15:21,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 09:15:21,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:22,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 09:15:22,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:22,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875505934] [2021-05-06 09:15:22,024 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:22,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591500781] [2021-05-06 09:15:22,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591500781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:22,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:22,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:15:22,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522044133] [2021-05-06 09:15:22,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:15:22,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:22,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:15:22,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:15:22,026 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 09:15:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:22,182 INFO L93 Difference]: Finished difference Result 166 states and 182 transitions. [2021-05-06 09:15:22,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 09:15:22,183 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 98 [2021-05-06 09:15:22,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:22,184 INFO L225 Difference]: With dead ends: 166 [2021-05-06 09:15:22,184 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 09:15:22,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:15:22,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 09:15:22,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2021-05-06 09:15:22,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 106 states have internal predecessors, (112), 35 states have call successors, (35), 25 states have call predecessors, (35), 24 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:15:22,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 179 transitions. [2021-05-06 09:15:22,189 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 179 transitions. Word has length 98 [2021-05-06 09:15:22,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:22,190 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 179 transitions. [2021-05-06 09:15:22,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 09:15:22,190 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 179 transitions. [2021-05-06 09:15:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 09:15:22,191 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:22,191 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:22,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 09:15:22,411 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:22,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1771017874, now seen corresponding path program 2 times [2021-05-06 09:15:22,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:22,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457979705] [2021-05-06 09:15:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:22,417 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:22,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171339268] [2021-05-06 09:15:22,418 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 09:15:22,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:15:22,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:15:22,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 09:15:22,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:22,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-06 09:15:22,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:22,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457979705] [2021-05-06 09:15:22,685 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:22,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171339268] [2021-05-06 09:15:22,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171339268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:22,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:22,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 09:15:22,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80075455] [2021-05-06 09:15:22,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 09:15:22,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:22,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 09:15:22,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:15:22,686 INFO L87 Difference]: Start difference. First operand 164 states and 179 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 09:15:22,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:22,809 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2021-05-06 09:15:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:15:22,809 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-06 09:15:22,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:22,810 INFO L225 Difference]: With dead ends: 168 [2021-05-06 09:15:22,810 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 09:15:22,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:15:22,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 09:15:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-06 09:15:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 82 states have internal predecessors, (88), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 09:15:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 142 transitions. [2021-05-06 09:15:22,814 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 142 transitions. Word has length 105 [2021-05-06 09:15:22,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:22,814 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 142 transitions. [2021-05-06 09:15:22,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 09:15:22,814 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 142 transitions. [2021-05-06 09:15:22,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 09:15:22,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:22,815 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:23,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 09:15:23,036 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:23,036 INFO L82 PathProgramCache]: Analyzing trace with hash 348272066, now seen corresponding path program 3 times [2021-05-06 09:15:23,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:23,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171936535] [2021-05-06 09:15:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:23,042 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:23,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142695529] [2021-05-06 09:15:23,042 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 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 09:15:23,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:15:23,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:15:23,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 09:15:23,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:23,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2021-05-06 09:15:23,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:23,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171936535] [2021-05-06 09:15:23,310 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:23,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142695529] [2021-05-06 09:15:23,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142695529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:23,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:23,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-06 09:15:23,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613655678] [2021-05-06 09:15:23,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 09:15:23,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:23,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 09:15:23,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:15:23,311 INFO L87 Difference]: Start difference. First operand 129 states and 142 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 09:15:23,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:23,329 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2021-05-06 09:15:23,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 09:15:23,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 109 [2021-05-06 09:15:23,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:23,330 INFO L225 Difference]: With dead ends: 137 [2021-05-06 09:15:23,330 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 09:15:23,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:15:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 09:15:23,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-06 09:15:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 86 states have internal predecessors, (92), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 09:15:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 154 transitions. [2021-05-06 09:15:23,334 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 154 transitions. Word has length 109 [2021-05-06 09:15:23,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:23,334 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 154 transitions. [2021-05-06 09:15:23,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 09:15:23,335 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 154 transitions. [2021-05-06 09:15:23,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 09:15:23,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:23,335 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 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 09:15:23,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 09:15:23,536 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:23,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:23,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1079108237, now seen corresponding path program 5 times [2021-05-06 09:15:23,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:23,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100254606] [2021-05-06 09:15:23,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:23,542 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:23,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020726423] [2021-05-06 09:15:23,542 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 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 09:15:23,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 09:15:23,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:15:23,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 09:15:23,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:23,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:23,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:24,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:24,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:24,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 09:15:24,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:24,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100254606] [2021-05-06 09:15:24,040 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:24,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020726423] [2021-05-06 09:15:24,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020726423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:24,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:24,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 09:15:24,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896378709] [2021-05-06 09:15:24,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 09:15:24,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:24,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 09:15:24,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 09:15:24,041 INFO L87 Difference]: Start difference. First operand 137 states and 154 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 09:15:24,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:24,280 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2021-05-06 09:15:24,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 09:15:24,281 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 111 [2021-05-06 09:15:24,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:24,282 INFO L225 Difference]: With dead ends: 161 [2021-05-06 09:15:24,282 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 09:15:24,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 09:15:24,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 09:15:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 150. [2021-05-06 09:15:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 95 states have internal predecessors, (102), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:15:24,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2021-05-06 09:15:24,285 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 111 [2021-05-06 09:15:24,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:24,286 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2021-05-06 09:15:24,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 09:15:24,286 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2021-05-06 09:15:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 09:15:24,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:24,287 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 5, 5, 4, 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 09:15:24,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:15:24,497 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:24,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1546710215, now seen corresponding path program 6 times [2021-05-06 09:15:24,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:24,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335133042] [2021-05-06 09:15:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:24,502 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:24,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137201774] [2021-05-06 09:15:24,503 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 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 09:15:24,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 09:15:24,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:15:24,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 09:15:24,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:24,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 133 proven. 16 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-05-06 09:15:24,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:15:24,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335133042] [2021-05-06 09:15:24,797 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:15:24,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137201774] [2021-05-06 09:15:24,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137201774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:15:24,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:15:24,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:15:24,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259800095] [2021-05-06 09:15:24,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:15:24,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:15:24,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:15:24,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:15:24,798 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 09:15:24,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:15:24,924 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2021-05-06 09:15:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 09:15:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2021-05-06 09:15:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:15:24,925 INFO L225 Difference]: With dead ends: 174 [2021-05-06 09:15:24,925 INFO L226 Difference]: Without dead ends: 174 [2021-05-06 09:15:24,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:15:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-06 09:15:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 163. [2021-05-06 09:15:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 104 states have internal predecessors, (113), 36 states have call successors, (36), 24 states have call predecessors, (36), 23 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 09:15:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 183 transitions. [2021-05-06 09:15:24,930 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 183 transitions. Word has length 115 [2021-05-06 09:15:24,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:15:24,930 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 183 transitions. [2021-05-06 09:15:24,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 09:15:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 183 transitions. [2021-05-06 09:15:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 09:15:24,931 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:15:24,932 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:15:25,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 09:15:25,150 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:15:25,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:15:25,151 INFO L82 PathProgramCache]: Analyzing trace with hash 394679903, now seen corresponding path program 4 times [2021-05-06 09:15:25,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:15:25,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680232120] [2021-05-06 09:15:25,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:15:25,161 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:15:25,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966711601] [2021-05-06 09:15:25,161 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 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 09:15:25,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:15:25,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:15:25,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:15:25,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:15:25,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:25,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:26,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:15:27,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:17:22,633 WARN L205 SmtUtils]: Spent 1.91 m on a formula simplification. DAG size of input: 25308 DAG size of output: 24817 [2021-05-06 09:17:26,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:17:28,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:17:30,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,850 WARN L205 SmtUtils]: Spent 1.90 m on a formula simplification. DAG size of input: 25362 DAG size of output: 24864