/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/cohendiv-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:23:10,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:23:10,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:23:10,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:23:10,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:23:10,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:23:10,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:23:10,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:23:10,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:23:10,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:23:10,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:23:10,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:23:10,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:23:10,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:23:10,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:23:10,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:23:10,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:23:10,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:23:10,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:23:10,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:23:10,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:23:10,451 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:23:10,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:23:10,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:23:10,453 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:23:10,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:23:10,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:23:10,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:23:10,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:23:10,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:23:10,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:23:10,454 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:23:10,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:23:10,455 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:23:10,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:23:10,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:23:10,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:23:10,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:23:10,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:23:10,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:23:10,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:23:10,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:23:10,457 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:23:10,457 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:23:10,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:23:10,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:23:10,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:23:10,839 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:23:10,840 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:23:10,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound2.c [2021-05-06 07:23:10,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e6db036d/875d5a95ed8e4eb48938487a4cedd6ce/FLAGc2b4fa4b8 [2021-05-06 07:23:11,172 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:23:11,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound2.c [2021-05-06 07:23:11,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e6db036d/875d5a95ed8e4eb48938487a4cedd6ce/FLAGc2b4fa4b8 [2021-05-06 07:23:11,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e6db036d/875d5a95ed8e4eb48938487a4cedd6ce [2021-05-06 07:23:11,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:23:11,622 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:23:11,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:23:11,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:23:11,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:23:11,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:23:11" (1/1) ... [2021-05-06 07:23:11,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ef8d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:23:11, skipping insertion in model container [2021-05-06 07:23:11,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:23:11" (1/1) ... [2021-05-06 07:23:11,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:23:11,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:23:11,729 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/cohendiv-ll_unwindbound2.c[576,589] [2021-05-06 07:23:11,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:23:11,744 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:23:11,752 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/cohendiv-ll_unwindbound2.c[576,589] [2021-05-06 07:23:11,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:23:11,765 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:23:11,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:23:11 WrapperNode [2021-05-06 07:23:11,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:23:11,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:23:11,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:23:11,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:23:11,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:23:11" (1/1) ... [2021-05-06 07:23:11,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:23:11" (1/1) ... [2021-05-06 07:23:11,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:23:11" (1/1) ... [2021-05-06 07:23:11,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:23:11" (1/1) ... [2021-05-06 07:23:11,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:23:11" (1/1) ... [2021-05-06 07:23:11,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:23:11" (1/1) ... [2021-05-06 07:23:11,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:23:11" (1/1) ... [2021-05-06 07:23:11,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:23:11,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:23:11,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:23:11,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:23:11,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:23:11" (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 07:23:11,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:23:11,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:23:11,993 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:23:11,993 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:23:11,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:23:11,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:23:11,994 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:23:11,994 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:23:11,994 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:23:11,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:23:11,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:23:11,995 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:23:11,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:23:11,995 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:23:11,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:23:11,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:23:11,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:23:11,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:23:11,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:23:11,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:23:12,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:23:12,248 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:23:12,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:23:12 BoogieIcfgContainer [2021-05-06 07:23:12,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:23:12,250 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:23:12,250 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:23:12,250 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:23:12,252 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:23:12" (1/1) ... [2021-05-06 07:23:12,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:23:12 BasicIcfg [2021-05-06 07:23:12,279 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:23:12,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:23:12,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:23:12,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:23:12,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:23:11" (1/4) ... [2021-05-06 07:23:12,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f2f4c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:23:12, skipping insertion in model container [2021-05-06 07:23:12,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:23:11" (2/4) ... [2021-05-06 07:23:12,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f2f4c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:23:12, skipping insertion in model container [2021-05-06 07:23:12,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:23:12" (3/4) ... [2021-05-06 07:23:12,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f2f4c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:23:12, skipping insertion in model container [2021-05-06 07:23:12,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:23:12" (4/4) ... [2021-05-06 07:23:12,284 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound2.cJordan [2021-05-06 07:23:12,287 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:23:12,306 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:23:12,317 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:23:12,355 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:23:12,355 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:23:12,356 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:23:12,356 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:23:12,356 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:23:12,356 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:23:12,356 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:23:12,356 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:23:12,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 07:23:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:23:12,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:23:12,379 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 07:23:12,379 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:23:12,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:23:12,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2021-05-06 07:23:12,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:23:12,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407997684] [2021-05-06 07:23:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:23:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:23:12,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:23:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:23:12,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:23:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:23:12,545 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 07:23:12,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:23:12,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407997684] [2021-05-06 07:23:12,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407997684] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:23:12,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:23:12,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:23:12,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555918898] [2021-05-06 07:23:12,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:23:12,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:23:12,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:23:12,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:23:12,559 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 07:23:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:23:12,655 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-06 07:23:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:23:12,657 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 07:23:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:23:12,662 INFO L225 Difference]: With dead ends: 39 [2021-05-06 07:23:12,662 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:23:12,663 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:23:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:23:12,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-06 07:23:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 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 07:23:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-06 07:23:12,702 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-06 07:23:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:23:12,702 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-06 07:23:12,702 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 07:23:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-06 07:23:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:23:12,703 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:23:12,703 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:23:12,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:23:12,703 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:23:12,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:23:12,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2021-05-06 07:23:12,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:23:12,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703121403] [2021-05-06 07:23:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:23:12,717 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:23:12,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406288580] [2021-05-06 07:23:12,717 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 07:23:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:23:12,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:23:12,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:23:12,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:12,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:12,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:12,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:12,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:12,887 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 07:23:12,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:23:12,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703121403] [2021-05-06 07:23:12,888 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:23:12,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406288580] [2021-05-06 07:23:12,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406288580] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:23:12,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:23:12,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:23:12,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802124890] [2021-05-06 07:23:12,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 07:23:12,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:23:12,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 07:23:12,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:23:12,890 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:23:12,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:23:12,902 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-06 07:23:12,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 07:23:12,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 07:23:12,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:23:12,903 INFO L225 Difference]: With dead ends: 35 [2021-05-06 07:23:12,903 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:23:12,904 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:23:12,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:23:12,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 07:23:12,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 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 07:23:12,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 07:23:12,908 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-06 07:23:12,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:23:12,909 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 07:23:12,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:23:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 07:23:12,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:23:12,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:23:12,909 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:23:13,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:23:13,126 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:23:13,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:23:13,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2021-05-06 07:23:13,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:23:13,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309113489] [2021-05-06 07:23:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:23:13,139 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:23:13,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541930627] [2021-05-06 07:23:13,139 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 07:23:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:23:13,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:23:13,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:23:13,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:13,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:13,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:13,288 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 07:23:13,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:23:13,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309113489] [2021-05-06 07:23:13,289 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:23:13,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541930627] [2021-05-06 07:23:13,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541930627] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:23:13,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:23:13,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:23:13,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89248481] [2021-05-06 07:23:13,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:23:13,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:23:13,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:23:13,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:23:13,291 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 07:23:13,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:23:13,374 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-06 07:23:13,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:23:13,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 18 [2021-05-06 07:23:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:23:13,375 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:23:13,375 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 07:23:13,375 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:23:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 07:23:13,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 07:23:13,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 07:23:13,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-06 07:23:13,380 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-06 07:23:13,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:23:13,381 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-06 07:23:13,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 07:23:13,381 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-06 07:23:13,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:23:13,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:23:13,381 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, 1] [2021-05-06 07:23:13,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:23:13,599 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:23:13,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:23:13,599 INFO L82 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2021-05-06 07:23:13,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:23:13,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867574902] [2021-05-06 07:23:13,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:23:13,609 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:23:13,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795720821] [2021-05-06 07:23:13,609 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 07:23:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:23:13,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:23:13,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:23:13,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:13,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:13,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:13,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:13,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:13,781 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 07:23:13,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:23:13,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867574902] [2021-05-06 07:23:13,781 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:23:13,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795720821] [2021-05-06 07:23:13,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795720821] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:23:13,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:23:13,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:23:13,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255900677] [2021-05-06 07:23:13,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:23:13,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:23:13,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:23:13,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:23:13,783 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:23:13,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:23:13,863 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-06 07:23:13,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:23:13,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 07:23:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:23:13,866 INFO L225 Difference]: With dead ends: 56 [2021-05-06 07:23:13,866 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 07:23:13,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:23:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 07:23:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-06 07:23:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 07:23:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-06 07:23:13,877 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-06 07:23:13,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:23:13,878 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-06 07:23:13,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:23:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-06 07:23:13,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 07:23:13,878 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:23:13,879 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, 1, 1, 1, 1] [2021-05-06 07:23:14,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:23:14,098 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:23:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:23:14,099 INFO L82 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2021-05-06 07:23:14,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:23:14,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026567022] [2021-05-06 07:23:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:23:14,122 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:23:14,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767260462] [2021-05-06 07:23:14,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:23:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:23:14,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:23:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:23:14,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:14,255 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 07:23:14,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:23:14,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026567022] [2021-05-06 07:23:14,255 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:23:14,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767260462] [2021-05-06 07:23:14,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767260462] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:23:14,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:23:14,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:23:14,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179125771] [2021-05-06 07:23:14,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:23:14,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:23:14,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:23:14,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:23:14,257 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:23:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:23:14,297 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2021-05-06 07:23:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:23:14,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2021-05-06 07:23:14,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:23:14,299 INFO L225 Difference]: With dead ends: 81 [2021-05-06 07:23:14,299 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 07:23:14,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:23:14,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 07:23:14,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-06 07:23:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 07:23:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-05-06 07:23:14,305 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2021-05-06 07:23:14,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:23:14,306 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-05-06 07:23:14,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:23:14,306 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-05-06 07:23:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 07:23:14,306 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:23:14,306 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:23:14,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:23:14,526 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:23:14,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:23:14,526 INFO L82 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2021-05-06 07:23:14,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:23:14,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582572873] [2021-05-06 07:23:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:23:14,537 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:23:14,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399840684] [2021-05-06 07:23:14,537 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 07:23:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:23:14,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:23:14,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:23:14,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:14,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:14,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:14,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:14,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:14,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:14,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:14,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:23:14,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:23:14,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582572873] [2021-05-06 07:23:14,643 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:23:14,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399840684] [2021-05-06 07:23:14,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399840684] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:23:14,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:23:14,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:23:14,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213524048] [2021-05-06 07:23:14,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:23:14,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:23:14,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:23:14,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:23:14,644 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:23:14,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:23:14,665 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2021-05-06 07:23:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:23:14,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-06 07:23:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:23:14,667 INFO L225 Difference]: With dead ends: 78 [2021-05-06 07:23:14,667 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 07:23:14,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:23:14,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 07:23:14,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 07:23:14,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 07:23:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-05-06 07:23:14,672 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2021-05-06 07:23:14,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:23:14,672 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-05-06 07:23:14,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:23:14,672 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-05-06 07:23:14,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 07:23:14,673 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:23:14,673 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:23:14,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:23:14,890 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:23:14,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:23:14,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2021-05-06 07:23:14,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:23:14,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820163518] [2021-05-06 07:23:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:23:14,910 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:23:14,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770680429] [2021-05-06 07:23:14,910 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 07:23:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:23:14,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:23:14,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:23:14,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:14,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 07:23:15,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:23:15,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820163518] [2021-05-06 07:23:15,084 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:23:15,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770680429] [2021-05-06 07:23:15,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770680429] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:23:15,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:23:15,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:23:15,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127216511] [2021-05-06 07:23:15,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:23:15,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:23:15,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:23:15,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:23:15,085 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 07:23:15,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:23:15,152 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2021-05-06 07:23:15,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:23:15,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-06 07:23:15,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:23:15,153 INFO L225 Difference]: With dead ends: 82 [2021-05-06 07:23:15,153 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 07:23:15,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:23:15,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 07:23:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-06 07:23:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 07:23:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-05-06 07:23:15,158 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2021-05-06 07:23:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:23:15,159 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-05-06 07:23:15,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 07:23:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-05-06 07:23:15,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 07:23:15,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:23:15,160 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:23:15,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:23:15,379 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:23:15,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:23:15,380 INFO L82 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2021-05-06 07:23:15,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:23:15,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489539943] [2021-05-06 07:23:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:23:15,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:23:15,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628133869] [2021-05-06 07:23:15,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:23:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:23:15,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:23:15,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:23:15,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 07:23:15,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:23:15,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489539943] [2021-05-06 07:23:15,520 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:23:15,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628133869] [2021-05-06 07:23:15,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628133869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:23:15,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:23:15,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:23:15,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928474035] [2021-05-06 07:23:15,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:23:15,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:23:15,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:23:15,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:23:15,522 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 07:23:15,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:23:15,599 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-05-06 07:23:15,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:23:15,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 07:23:15,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:23:15,600 INFO L225 Difference]: With dead ends: 86 [2021-05-06 07:23:15,600 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 07:23:15,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:23:15,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 07:23:15,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 07:23:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 07:23:15,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-05-06 07:23:15,605 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2021-05-06 07:23:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:23:15,605 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-05-06 07:23:15,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 07:23:15,606 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-05-06 07:23:15,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 07:23:15,606 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:23:15,606 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:23:15,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:23:15,823 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:23:15,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:23:15,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2021-05-06 07:23:15,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:23:15,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140191602] [2021-05-06 07:23:15,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:23:15,830 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:23:15,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138604846] [2021-05-06 07:23:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:23:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:23:15,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:23:15,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:23:15,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 07:23:15,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:23:15,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140191602] [2021-05-06 07:23:15,984 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:23:15,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138604846] [2021-05-06 07:23:15,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138604846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:23:15,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:23:15,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:23:15,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964610346] [2021-05-06 07:23:15,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:23:15,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:23:15,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:23:15,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:23:15,987 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 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 07:23:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:23:16,078 INFO L93 Difference]: Finished difference Result 120 states and 156 transitions. [2021-05-06 07:23:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:23:16,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 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 50 [2021-05-06 07:23:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:23:16,082 INFO L225 Difference]: With dead ends: 120 [2021-05-06 07:23:16,082 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 07:23:16,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:23:16,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 07:23:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2021-05-06 07:23:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 72 states have internal predecessors, (85), 32 states have call successors, (32), 12 states have call predecessors, (32), 11 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 07:23:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2021-05-06 07:23:16,099 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 50 [2021-05-06 07:23:16,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:23:16,100 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2021-05-06 07:23:16,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 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 07:23:16,100 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2021-05-06 07:23:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 07:23:16,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:23:16,101 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:23:16,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 07:23:16,301 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:23:16,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:23:16,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1119467195, now seen corresponding path program 1 times [2021-05-06 07:23:16,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:23:16,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340037472] [2021-05-06 07:23:16,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:23:16,308 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:23:16,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986026669] [2021-05-06 07:23:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:23:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:23:16,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 07:23:16,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:23:16,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 07:23:16,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:23:16,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340037472] [2021-05-06 07:23:16,713 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:23:16,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986026669] [2021-05-06 07:23:16,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986026669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:23:16,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:23:16,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 07:23:16,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897805127] [2021-05-06 07:23:16,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 07:23:16,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:23:16,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 07:23:16,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:23:16,715 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 07:23:16,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:23:16,976 INFO L93 Difference]: Finished difference Result 156 states and 209 transitions. [2021-05-06 07:23:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:23:16,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 58 [2021-05-06 07:23:16,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:23:16,978 INFO L225 Difference]: With dead ends: 156 [2021-05-06 07:23:16,978 INFO L226 Difference]: Without dead ends: 155 [2021-05-06 07:23:16,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:23:16,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-06 07:23:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 130. [2021-05-06 07:23:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 80 states have (on average 1.2125) internal successors, (97), 83 states have internal predecessors, (97), 37 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 07:23:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 169 transitions. [2021-05-06 07:23:16,999 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 169 transitions. Word has length 58 [2021-05-06 07:23:17,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:23:17,000 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 169 transitions. [2021-05-06 07:23:17,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 07:23:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 169 transitions. [2021-05-06 07:23:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 07:23:17,005 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:23:17,005 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:23:17,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:23:17,222 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:23:17,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:23:17,223 INFO L82 PathProgramCache]: Analyzing trace with hash -469414513, now seen corresponding path program 1 times [2021-05-06 07:23:17,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:23:17,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551217773] [2021-05-06 07:23:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:23:17,228 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:23:17,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077641934] [2021-05-06 07:23:17,229 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 07:23:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:23:17,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:23:17,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:23:17,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 07:23:17,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:23:17,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551217773] [2021-05-06 07:23:17,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:23:17,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077641934] [2021-05-06 07:23:17,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077641934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:23:17,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:23:17,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:23:17,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385806141] [2021-05-06 07:23:17,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:23:17,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:23:17,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:23:17,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:23:17,411 INFO L87 Difference]: Start difference. First operand 130 states and 169 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 07:23:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:23:17,444 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-05-06 07:23:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:23:17,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 66 [2021-05-06 07:23:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:23:17,445 INFO L225 Difference]: With dead ends: 83 [2021-05-06 07:23:17,445 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 07:23:17,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:23:17,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 07:23:17,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 07:23:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 17 states have call successors, (17), 11 states have call predecessors, (17), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 07:23:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-05-06 07:23:17,447 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 66 [2021-05-06 07:23:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:23:17,447 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-05-06 07:23:17,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 07:23:17,448 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-05-06 07:23:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 07:23:17,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:23:17,448 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:23:17,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:23:17,670 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:23:17,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:23:17,670 INFO L82 PathProgramCache]: Analyzing trace with hash -792688430, now seen corresponding path program 2 times [2021-05-06 07:23:17,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:23:17,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414416483] [2021-05-06 07:23:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:23:17,676 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:23:17,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472730187] [2021-05-06 07:23:17,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:23:17,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:23:17,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:23:17,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:23:17,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:23:17,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:23:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 153 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 07:23:17,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:23:17,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414416483] [2021-05-06 07:23:17,922 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:23:17,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472730187] [2021-05-06 07:23:17,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472730187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:23:17,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:23:17,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:23:17,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739723793] [2021-05-06 07:23:17,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:23:17,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:23:17,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:23:17,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:23:17,923 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 07:23:17,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:23:17,956 INFO L93 Difference]: Finished difference Result 51 states and 50 transitions. [2021-05-06 07:23:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:23:17,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 82 [2021-05-06 07:23:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:23:17,957 INFO L225 Difference]: With dead ends: 51 [2021-05-06 07:23:17,957 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:23:17,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:23:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:23:17,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:23:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 07:23:17,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:23:17,958 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2021-05-06 07:23:17,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:23:17,958 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:23:17,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 07:23:17,958 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:23:17,958 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:23:18,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 07:23:18,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:23:18 BasicIcfg [2021-05-06 07:23:18,179 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:23:18,179 INFO L168 Benchmark]: Toolchain (without parser) took 6557.86 ms. Allocated memory was 176.2 MB in the beginning and 238.0 MB in the end (delta: 61.9 MB). Free memory was 142.7 MB in the beginning and 148.8 MB in the end (delta: -6.1 MB). Peak memory consumption was 57.4 MB. Max. memory is 8.0 GB. [2021-05-06 07:23:18,180 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 176.2 MB. Free memory is still 158.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:23:18,180 INFO L168 Benchmark]: CACSL2BoogieTranslator took 141.50 ms. Allocated memory is still 176.2 MB. Free memory was 142.5 MB in the beginning and 132.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 07:23:18,180 INFO L168 Benchmark]: Boogie Preprocessor took 18.93 ms. Allocated memory is still 176.2 MB. Free memory was 132.5 MB in the beginning and 131.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:23:18,180 INFO L168 Benchmark]: RCFGBuilder took 463.59 ms. Allocated memory is still 176.2 MB. Free memory was 131.0 MB in the beginning and 144.6 MB in the end (delta: -13.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-06 07:23:18,180 INFO L168 Benchmark]: IcfgTransformer took 29.11 ms. Allocated memory is still 176.2 MB. Free memory was 144.6 MB in the beginning and 143.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:23:18,180 INFO L168 Benchmark]: TraceAbstraction took 5899.25 ms. Allocated memory was 176.2 MB in the beginning and 238.0 MB in the end (delta: 61.9 MB). Free memory was 143.0 MB in the beginning and 148.8 MB in the end (delta: -5.8 MB). Peak memory consumption was 57.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:23:18,180 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 176.2 MB. Free memory is still 158.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 141.50 ms. Allocated memory is still 176.2 MB. Free memory was 142.5 MB in the beginning and 132.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.93 ms. Allocated memory is still 176.2 MB. Free memory was 132.5 MB in the beginning and 131.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 463.59 ms. Allocated memory is still 176.2 MB. Free memory was 131.0 MB in the beginning and 144.6 MB in the end (delta: -13.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * IcfgTransformer took 29.11 ms. Allocated memory is still 176.2 MB. Free memory was 144.6 MB in the beginning and 143.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5899.25 ms. Allocated memory was 176.2 MB in the beginning and 238.0 MB in the end (delta: 61.9 MB). Free memory was 143.0 MB in the beginning and 148.8 MB in the end (delta: -5.8 MB). Peak memory consumption was 57.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5822.2ms, OverallIterations: 12, TraceHistogramMax: 11, EmptinessCheckTime: 27.3ms, AutomataDifference: 941.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 510 SDtfs, 249 SDslu, 1547 SDs, 0 SdLazy, 816 SolverSat, 136 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 541.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 480 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 379.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=10, InterpolantAutomatonStates: 79, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 109.7ms AutomataMinimizationTime, 12 MinimizatonAttempts, 42 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 93.8ms SsaConstructionTime, 284.1ms SatisfiabilityAnalysisTime, 1364.5ms InterpolantComputationTime, 485 NumberOfCodeBlocks, 485 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 473 ConstructedInterpolants, 0 QuantifiedInterpolants, 1354 SizeOfPredicates, 27 NumberOfNonLiveVariables, 1875 ConjunctsInSsa, 122 ConjunctsInUnsatCore, 12 InterpolantComputations, 7 PerfectInterpolantSequences, 539/554 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...