/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:45:21,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:45:21,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:45:21,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:45:21,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:45:21,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:45:21,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:45:21,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:45:21,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:45:21,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:45:21,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:45:21,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:45:21,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:45:21,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:45:21,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:45:21,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:45:21,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:45:21,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:45:21,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:45:21,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:45:21,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:45:21,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:45:21,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:45:21,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:45:21,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:45:21,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:45:21,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:45:21,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:45:21,788 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:45:21,819 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:45:21,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:45:21,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:45:21,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:45:21,823 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:45:21,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:45:21,824 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:45:21,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:45:21,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:45:21,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:45:21,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:45:21,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:45:21,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:45:21,827 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:45:21,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:45:21,829 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:45:21,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:45:21,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:45:21,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:45:21,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:45:21,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:45:21,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:45:21,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:45:21,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:45:21,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:45:21,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:45:21,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:45:21,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:45:21,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:45:21,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:45:22,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:45:22,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:45:22,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:45:22,305 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:45:22,306 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:45:22,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-10-23 18:45:22,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd62cfd8/dbbf168a317c410681092e5f7b02ab22/FLAG4236f56da [2020-10-23 18:45:23,144 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:45:23,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-10-23 18:45:23,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd62cfd8/dbbf168a317c410681092e5f7b02ab22/FLAG4236f56da [2020-10-23 18:45:23,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd62cfd8/dbbf168a317c410681092e5f7b02ab22 [2020-10-23 18:45:23,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:45:23,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:45:23,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:45:23,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:45:23,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:45:23,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:45:23" (1/1) ... [2020-10-23 18:45:23,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d1b15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:23, skipping insertion in model container [2020-10-23 18:45:23,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:45:23" (1/1) ... [2020-10-23 18:45:23,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:45:23,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:45:23,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:45:23,715 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:45:23,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:45:23,759 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:45:23,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:23 WrapperNode [2020-10-23 18:45:23,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:45:23,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:45:23,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:45:23,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:45:23,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:23" (1/1) ... [2020-10-23 18:45:23,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:23" (1/1) ... [2020-10-23 18:45:23,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:23" (1/1) ... [2020-10-23 18:45:23,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:23" (1/1) ... [2020-10-23 18:45:23,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:23" (1/1) ... [2020-10-23 18:45:23,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:23" (1/1) ... [2020-10-23 18:45:23,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:23" (1/1) ... [2020-10-23 18:45:23,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:45:23,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:45:23,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:45:23,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:45:23,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:23" (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 [2020-10-23 18:45:23,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:45:23,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:45:23,880 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:45:23,880 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:45:23,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:45:23,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:45:23,881 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:45:23,881 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:45:23,881 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:45:23,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:45:23,881 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:45:23,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:45:23,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:45:23,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:45:23,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:45:23,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:45:23,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:45:23,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:45:23,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:45:23,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:45:24,473 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:45:24,473 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:45:24,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:45:24 BoogieIcfgContainer [2020-10-23 18:45:24,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:45:24,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:45:24,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:45:24,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:45:24,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:45:23" (1/3) ... [2020-10-23 18:45:24,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b98ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:45:24, skipping insertion in model container [2020-10-23 18:45:24,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:23" (2/3) ... [2020-10-23 18:45:24,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b98ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:45:24, skipping insertion in model container [2020-10-23 18:45:24,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:45:24" (3/3) ... [2020-10-23 18:45:24,491 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt9.c [2020-10-23 18:45:24,506 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:45:24,512 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:45:24,527 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:45:24,570 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:45:24,570 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:45:24,571 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:45:24,571 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:45:24,571 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:45:24,571 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:45:24,571 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:45:24,571 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:45:24,597 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-23 18:45:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:45:24,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:24,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:24,607 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:24,618 INFO L82 PathProgramCache]: Analyzing trace with hash -36378530, now seen corresponding path program 1 times [2020-10-23 18:45:24,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:24,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150767387] [2020-10-23 18:45:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:25,279 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-10-23 18:45:25,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:25,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150767387] [2020-10-23 18:45:25,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:45:25,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 18:45:25,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893413152] [2020-10-23 18:45:25,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:45:25,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:25,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:45:25,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:45:25,416 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 8 states. [2020-10-23 18:45:28,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:28,254 INFO L93 Difference]: Finished difference Result 73 states and 105 transitions. [2020-10-23 18:45:28,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:45:28,257 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-23 18:45:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:28,267 INFO L225 Difference]: With dead ends: 73 [2020-10-23 18:45:28,267 INFO L226 Difference]: Without dead ends: 36 [2020-10-23 18:45:28,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:45:28,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-23 18:45:28,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-23 18:45:28,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-23 18:45:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-10-23 18:45:28,324 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 15 [2020-10-23 18:45:28,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:28,324 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-10-23 18:45:28,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:45:28,325 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-10-23 18:45:28,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:45:28,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:28,326 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:28,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:45:28,327 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:28,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:28,328 INFO L82 PathProgramCache]: Analyzing trace with hash -2128527166, now seen corresponding path program 1 times [2020-10-23 18:45:28,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:28,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652102928] [2020-10-23 18:45:28,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:28,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:28,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:28,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652102928] [2020-10-23 18:45:28,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106111488] [2020-10-23 18:45:28,591 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 [2020-10-23 18:45:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:28,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-23 18:45:28,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:28,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:28,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2020-10-23 18:45:28,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412453969] [2020-10-23 18:45:28,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:45:28,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:28,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:45:28,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:45:28,993 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 12 states. [2020-10-23 18:45:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:29,706 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2020-10-23 18:45:29,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:45:29,707 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-23 18:45:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:29,708 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:45:29,709 INFO L226 Difference]: Without dead ends: 43 [2020-10-23 18:45:29,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:45:29,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-23 18:45:29,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-23 18:45:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 18:45:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-23 18:45:29,722 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2020-10-23 18:45:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:29,722 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-23 18:45:29,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:45:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-23 18:45:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:45:29,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:29,724 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:29,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:45:29,938 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:29,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:29,940 INFO L82 PathProgramCache]: Analyzing trace with hash 803105763, now seen corresponding path program 1 times [2020-10-23 18:45:29,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:29,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267824604] [2020-10-23 18:45:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:30,467 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-10-23 18:45:30,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:30,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:30,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267824604] [2020-10-23 18:45:30,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483623103] [2020-10-23 18:45:30,570 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 [2020-10-23 18:45:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:30,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-23 18:45:30,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:30,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:30,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:30,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-10-23 18:45:30,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170520895] [2020-10-23 18:45:30,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:45:30,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:30,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:45:30,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:45:30,909 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 15 states. [2020-10-23 18:45:32,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:32,174 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2020-10-23 18:45:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:45:32,175 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-23 18:45:32,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:32,178 INFO L225 Difference]: With dead ends: 75 [2020-10-23 18:45:32,178 INFO L226 Difference]: Without dead ends: 57 [2020-10-23 18:45:32,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:45:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-23 18:45:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-23 18:45:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-23 18:45:32,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-23 18:45:32,193 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 30 [2020-10-23 18:45:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:32,193 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-23 18:45:32,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:45:32,194 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-23 18:45:32,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:45:32,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:32,195 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:32,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:32,410 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:32,411 INFO L82 PathProgramCache]: Analyzing trace with hash -163948740, now seen corresponding path program 1 times [2020-10-23 18:45:32,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:32,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125908038] [2020-10-23 18:45:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:33,048 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2020-10-23 18:45:33,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:33,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:33,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 18:45:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:45:33,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125908038] [2020-10-23 18:45:33,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278474305] [2020-10-23 18:45:33,155 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 [2020-10-23 18:45:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:33,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-23 18:45:33,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:33,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:45:33,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:33,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2020-10-23 18:45:33,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408981578] [2020-10-23 18:45:33,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:45:33,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:33,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:45:33,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:45:33,628 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 19 states. [2020-10-23 18:45:34,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:34,973 INFO L93 Difference]: Finished difference Result 89 states and 113 transitions. [2020-10-23 18:45:34,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:45:34,984 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-23 18:45:34,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:34,986 INFO L225 Difference]: With dead ends: 89 [2020-10-23 18:45:34,986 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 18:45:34,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:45:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 18:45:35,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-23 18:45:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 18:45:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-10-23 18:45:35,022 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 45 [2020-10-23 18:45:35,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:35,023 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-10-23 18:45:35,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:45:35,023 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-10-23 18:45:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 18:45:35,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:35,025 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:35,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:35,244 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:35,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:35,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1829600785, now seen corresponding path program 1 times [2020-10-23 18:45:35,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:35,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606934505] [2020-10-23 18:45:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:35,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:35,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:35,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 18:45:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:35,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 18:45:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-23 18:45:35,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606934505] [2020-10-23 18:45:35,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522527838] [2020-10-23 18:45:35,966 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 [2020-10-23 18:45:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-23 18:45:36,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:36,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-23 18:45:36,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:36,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2020-10-23 18:45:36,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930981881] [2020-10-23 18:45:36,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 18:45:36,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:36,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 18:45:36,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:45:36,534 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 23 states. [2020-10-23 18:45:38,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:38,108 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2020-10-23 18:45:38,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 18:45:38,109 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-10-23 18:45:38,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:38,111 INFO L225 Difference]: With dead ends: 102 [2020-10-23 18:45:38,111 INFO L226 Difference]: Without dead ends: 84 [2020-10-23 18:45:38,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 18:45:38,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-23 18:45:38,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-23 18:45:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-23 18:45:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2020-10-23 18:45:38,128 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 59 [2020-10-23 18:45:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:38,128 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2020-10-23 18:45:38,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 18:45:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2020-10-23 18:45:38,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-23 18:45:38,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:38,130 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:38,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:38,345 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:38,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:38,346 INFO L82 PathProgramCache]: Analyzing trace with hash 218915979, now seen corresponding path program 1 times [2020-10-23 18:45:38,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:38,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937917156] [2020-10-23 18:45:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:38,993 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-10-23 18:45:39,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:39,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:39,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 18:45:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:39,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 18:45:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:39,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-23 18:45:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-23 18:45:39,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937917156] [2020-10-23 18:45:39,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852559660] [2020-10-23 18:45:39,126 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 [2020-10-23 18:45:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:39,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-23 18:45:39,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:39,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-23 18:45:39,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:39,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2020-10-23 18:45:39,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800261953] [2020-10-23 18:45:39,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 18:45:39,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:39,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 18:45:39,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:45:39,821 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 27 states. [2020-10-23 18:45:41,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:41,693 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2020-10-23 18:45:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:45:41,694 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2020-10-23 18:45:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:41,696 INFO L225 Difference]: With dead ends: 114 [2020-10-23 18:45:41,696 INFO L226 Difference]: Without dead ends: 96 [2020-10-23 18:45:41,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2020-10-23 18:45:41,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-23 18:45:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-23 18:45:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-23 18:45:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2020-10-23 18:45:41,714 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 72 [2020-10-23 18:45:41,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:41,715 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2020-10-23 18:45:41,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 18:45:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2020-10-23 18:45:41,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-23 18:45:41,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:41,717 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:41,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:45:41,931 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:41,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1637563911, now seen corresponding path program 1 times [2020-10-23 18:45:41,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:41,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230997604] [2020-10-23 18:45:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 18:45:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 18:45:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-23 18:45:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-23 18:45:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 110 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:45:42,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230997604] [2020-10-23 18:45:42,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203055749] [2020-10-23 18:45:42,868 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 [2020-10-23 18:45:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 47 conjunts are in the unsatisfiable core [2020-10-23 18:45:42,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:43,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 110 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:45:43,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:43,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2020-10-23 18:45:43,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170298612] [2020-10-23 18:45:43,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-23 18:45:43,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:43,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-23 18:45:43,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2020-10-23 18:45:43,800 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 31 states. [2020-10-23 18:45:46,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:46,608 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2020-10-23 18:45:46,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:45:46,609 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 84 [2020-10-23 18:45:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:46,610 INFO L225 Difference]: With dead ends: 125 [2020-10-23 18:45:46,610 INFO L226 Difference]: Without dead ends: 107 [2020-10-23 18:45:46,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=250, Invalid=1912, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 18:45:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-23 18:45:46,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-23 18:45:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-23 18:45:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2020-10-23 18:45:46,648 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 84 [2020-10-23 18:45:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:46,648 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2020-10-23 18:45:46,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-23 18:45:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2020-10-23 18:45:46,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-23 18:45:46,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:46,654 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:46,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:46,868 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:46,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:46,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2040663268, now seen corresponding path program 1 times [2020-10-23 18:45:46,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:46,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540693486] [2020-10-23 18:45:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 18:45:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 18:45:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-23 18:45:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-23 18:45:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-23 18:45:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 12 proven. 149 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-23 18:45:47,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540693486] [2020-10-23 18:45:47,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68700011] [2020-10-23 18:45:47,834 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 [2020-10-23 18:45:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:47,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 51 conjunts are in the unsatisfiable core [2020-10-23 18:45:47,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:48,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 12 proven. 149 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-23 18:45:48,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:48,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2020-10-23 18:45:48,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706703081] [2020-10-23 18:45:48,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-23 18:45:48,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:48,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-23 18:45:48,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 18:45:48,906 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand 35 states. [2020-10-23 18:45:52,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:52,282 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2020-10-23 18:45:52,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 18:45:52,283 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 95 [2020-10-23 18:45:52,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:52,286 INFO L225 Difference]: With dead ends: 135 [2020-10-23 18:45:52,286 INFO L226 Difference]: Without dead ends: 117 [2020-10-23 18:45:52,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=307, Invalid=2449, Unknown=0, NotChecked=0, Total=2756 [2020-10-23 18:45:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-23 18:45:52,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-23 18:45:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-23 18:45:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2020-10-23 18:45:52,311 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 95 [2020-10-23 18:45:52,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:52,312 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2020-10-23 18:45:52,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-23 18:45:52,312 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2020-10-23 18:45:52,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-23 18:45:52,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:52,314 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:52,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:52,530 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:52,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:52,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1184588731, now seen corresponding path program 1 times [2020-10-23 18:45:52,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:52,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183650693] [2020-10-23 18:45:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:53,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:53,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:53,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 18:45:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:53,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 18:45:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:53,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-23 18:45:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:53,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-23 18:45:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:53,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-23 18:45:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:53,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-23 18:45:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 189 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-23 18:45:53,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183650693] [2020-10-23 18:45:53,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38123189] [2020-10-23 18:45:53,541 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 [2020-10-23 18:45:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:53,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 55 conjunts are in the unsatisfiable core [2020-10-23 18:45:53,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:54,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 189 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-23 18:45:54,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:54,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2020-10-23 18:45:54,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912778464] [2020-10-23 18:45:54,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-23 18:45:54,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:54,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-23 18:45:54,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 18:45:54,833 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand 39 states. [2020-10-23 18:45:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:58,611 INFO L93 Difference]: Finished difference Result 144 states and 163 transitions. [2020-10-23 18:45:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 18:45:58,611 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 105 [2020-10-23 18:45:58,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:58,613 INFO L225 Difference]: With dead ends: 144 [2020-10-23 18:45:58,614 INFO L226 Difference]: Without dead ends: 126 [2020-10-23 18:45:58,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=370, Invalid=3052, Unknown=0, NotChecked=0, Total=3422 [2020-10-23 18:45:58,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-23 18:45:58,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-23 18:45:58,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-23 18:45:58,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 134 transitions. [2020-10-23 18:45:58,634 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 134 transitions. Word has length 105 [2020-10-23 18:45:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:58,635 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 134 transitions. [2020-10-23 18:45:58,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-23 18:45:58,635 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 134 transitions. [2020-10-23 18:45:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-23 18:45:58,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:58,638 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:58,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 18:45:58,849 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:58,850 INFO L82 PathProgramCache]: Analyzing trace with hash -482469717, now seen corresponding path program 1 times [2020-10-23 18:45:58,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:58,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222675019] [2020-10-23 18:45:58,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:59,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:59,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:59,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 18:45:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:00,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 18:46:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:00,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-23 18:46:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:00,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-23 18:46:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:00,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-23 18:46:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:00,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-23 18:46:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:00,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-23 18:46:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 16 proven. 228 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-23 18:46:00,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222675019] [2020-10-23 18:46:00,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452740897] [2020-10-23 18:46:00,109 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 [2020-10-23 18:46:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:00,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 59 conjunts are in the unsatisfiable core [2020-10-23 18:46:00,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:46:01,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:46:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 16 proven. 228 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-23 18:46:01,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:46:01,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2020-10-23 18:46:01,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946387078] [2020-10-23 18:46:01,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-23 18:46:01,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:46:01,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-23 18:46:01,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1559, Unknown=0, NotChecked=0, Total=1806 [2020-10-23 18:46:01,638 INFO L87 Difference]: Start difference. First operand 126 states and 134 transitions. Second operand 43 states. [2020-10-23 18:46:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:46:06,367 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2020-10-23 18:46:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-23 18:46:06,368 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 114 [2020-10-23 18:46:06,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:46:06,371 INFO L225 Difference]: With dead ends: 163 [2020-10-23 18:46:06,371 INFO L226 Difference]: Without dead ends: 145 [2020-10-23 18:46:06,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=466, Invalid=3956, Unknown=0, NotChecked=0, Total=4422 [2020-10-23 18:46:06,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-23 18:46:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 136. [2020-10-23 18:46:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-23 18:46:06,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2020-10-23 18:46:06,392 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 114 [2020-10-23 18:46:06,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:46:06,393 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2020-10-23 18:46:06,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-23 18:46:06,393 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2020-10-23 18:46:06,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-23 18:46:06,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:46:06,396 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 8, 7, 6, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:46:06,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:46:06,610 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:46:06,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:46:06,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2037508979, now seen corresponding path program 2 times [2020-10-23 18:46:06,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:46:06,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832351292] [2020-10-23 18:46:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:46:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:46:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:46:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 18:46:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 18:46:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-23 18:46:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-23 18:46:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-23 18:46:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-23 18:46:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-23 18:46:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-23 18:46:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-23 18:46:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 40 proven. 284 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-23 18:46:07,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832351292] [2020-10-23 18:46:07,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876362573] [2020-10-23 18:46:07,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true