/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/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-15 22:53:44,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 22:53:44,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 22:53:44,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 22:53:44,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 22:53:44,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 22:53:44,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 22:53:44,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 22:53:44,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 22:53:44,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 22:53:44,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 22:53:44,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 22:53:44,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 22:53:44,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 22:53:44,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 22:53:44,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 22:53:44,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-15 22:53:44,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 22:53:44,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 22:53:44,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 22:53:44,834 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 [2021-04-15 22:53:44,865 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 22:53:44,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 22:53:44,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 22:53:44,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 22:53:44,868 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 22:53:44,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 22:53:44,868 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 22:53:44,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 22:53:44,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 22:53:44,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 22:53:44,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 22:53:44,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 22:53:44,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 22:53:44,869 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 22:53:44,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 22:53:44,869 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 22:53:44,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 22:53:44,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 22:53:44,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 22:53:44,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 22:53:44,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 22:53:44,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 22:53:44,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 22:53:44,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 22:53:44,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 22:53:44,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 22:53:44,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 22:53:44,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-04-15 22:53:44,871 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 22:53:45,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 22:53:45,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 22:53:45,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 22:53:45,353 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-15 22:53:45,354 INFO L275 PluginConnector]: CDTParser initialized [2021-04-15 22:53:45,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-04-15 22:53:45,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d194d3f0f/ae4354edd4184100bf21bebded567f80/FLAG72d5253ac [2021-04-15 22:53:45,784 INFO L306 CDTParser]: Found 1 translation units. [2021-04-15 22:53:45,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-04-15 22:53:45,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d194d3f0f/ae4354edd4184100bf21bebded567f80/FLAG72d5253ac [2021-04-15 22:53:45,806 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d194d3f0f/ae4354edd4184100bf21bebded567f80 [2021-04-15 22:53:45,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 22:53:45,847 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 22:53:45,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-15 22:53:45,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-15 22:53:45,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-15 22:53:45,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 10:53:45" (1/1) ... [2021-04-15 22:53:45,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce76383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:45, skipping insertion in model container [2021-04-15 22:53:45,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 10:53:45" (1/1) ... [2021-04-15 22:53:45,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-15 22:53:45,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-15 22:53:45,981 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c[416,429] [2021-04-15 22:53:45,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 22:53:46,000 INFO L203 MainTranslator]: Completed pre-run [2021-04-15 22:53:46,009 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c[416,429] [2021-04-15 22:53:46,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 22:53:46,024 INFO L208 MainTranslator]: Completed translation [2021-04-15 22:53:46,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:46 WrapperNode [2021-04-15 22:53:46,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-15 22:53:46,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 22:53:46,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 22:53:46,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 22:53:46,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:46" (1/1) ... [2021-04-15 22:53:46,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:46" (1/1) ... [2021-04-15 22:53:46,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:46" (1/1) ... [2021-04-15 22:53:46,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:46" (1/1) ... [2021-04-15 22:53:46,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:46" (1/1) ... [2021-04-15 22:53:46,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:46" (1/1) ... [2021-04-15 22:53:46,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:46" (1/1) ... [2021-04-15 22:53:46,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 22:53:46,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 22:53:46,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 22:53:46,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 22:53:46,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:46" (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 [2021-04-15 22:53:46,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-15 22:53:46,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 22:53:46,205 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-15 22:53:46,205 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-15 22:53:46,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-15 22:53:46,206 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-15 22:53:46,206 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-15 22:53:46,206 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-15 22:53:46,206 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-15 22:53:46,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-15 22:53:46,206 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-15 22:53:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-15 22:53:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-15 22:53:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-15 22:53:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-15 22:53:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-15 22:53:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 22:53:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-15 22:53:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-15 22:53:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-15 22:53:46,472 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 22:53:46,472 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-15 22:53:46,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 10:53:46 BoogieIcfgContainer [2021-04-15 22:53:46,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 22:53:46,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 22:53:46,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 22:53:46,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 22:53:46,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 10:53:45" (1/3) ... [2021-04-15 22:53:46,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e55859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 10:53:46, skipping insertion in model container [2021-04-15 22:53:46,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:46" (2/3) ... [2021-04-15 22:53:46,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e55859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 10:53:46, skipping insertion in model container [2021-04-15 22:53:46,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 10:53:46" (3/3) ... [2021-04-15 22:53:46,478 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2021-04-15 22:53:46,481 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 22:53:46,483 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 22:53:46,521 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-15 22:53:46,550 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 22:53:46,550 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 22:53:46,550 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 22:53:46,550 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 22:53:46,550 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 22:53:46,550 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 22:53:46,550 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 22:53:46,550 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 22:53:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-04-15 22:53:46,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 22:53:46,576 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 22:53:46,577 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 22:53:46,577 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 22:53:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 22:53:46,580 INFO L82 PathProgramCache]: Analyzing trace with hash 669529748, now seen corresponding path program 1 times [2021-04-15 22:53:46,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 22:53:46,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605161169] [2021-04-15 22:53:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 22:53:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:46,727 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:46,728 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:46,729 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:46,730 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:46,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 22:53:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:46,790 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:46,790 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 22:53:46,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605161169] [2021-04-15 22:53:46,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 22:53:46,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 22:53:46,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080783512] [2021-04-15 22:53:46,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 22:53:46,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 22:53:46,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 22:53:46,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 22:53:46,804 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:46,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 22:53:46,843 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-04-15 22:53:46,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 22:53:46,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-04-15 22:53:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 22:53:46,848 INFO L225 Difference]: With dead ends: 41 [2021-04-15 22:53:46,848 INFO L226 Difference]: Without dead ends: 20 [2021-04-15 22:53:46,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 22:53:46,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-04-15 22:53:46,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-04-15 22:53:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-15 22:53:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-04-15 22:53:46,873 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-04-15 22:53:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 22:53:46,873 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-04-15 22:53:46,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:46,873 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-04-15 22:53:46,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 22:53:46,874 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 22:53:46,875 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 22:53:46,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 22:53:46,875 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 22:53:46,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 22:53:46,876 INFO L82 PathProgramCache]: Analyzing trace with hash 657523975, now seen corresponding path program 1 times [2021-04-15 22:53:46,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 22:53:46,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632646206] [2021-04-15 22:53:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 22:53:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:46,918 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:46,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:46,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:46,922 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-15 22:53:46,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:46,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:46,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 22:53:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:46,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:46,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 22:53:46,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632646206] [2021-04-15 22:53:46,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 22:53:46,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 22:53:46,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871137235] [2021-04-15 22:53:46,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 22:53:46,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 22:53:46,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 22:53:46,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 22:53:46,986 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 22:53:47,085 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-04-15 22:53:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 22:53:47,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-04-15 22:53:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 22:53:47,087 INFO L225 Difference]: With dead ends: 33 [2021-04-15 22:53:47,087 INFO L226 Difference]: Without dead ends: 26 [2021-04-15 22:53:47,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 22:53:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-04-15 22:53:47,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-04-15 22:53:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-15 22:53:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-04-15 22:53:47,101 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2021-04-15 22:53:47,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 22:53:47,101 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-04-15 22:53:47,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:47,104 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-04-15 22:53:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 22:53:47,106 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 22:53:47,106 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 22:53:47,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 22:53:47,111 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 22:53:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 22:53:47,112 INFO L82 PathProgramCache]: Analyzing trace with hash 659251853, now seen corresponding path program 1 times [2021-04-15 22:53:47,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 22:53:47,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696959265] [2021-04-15 22:53:47,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 22:53:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:47,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:47,152 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:47,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:47,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-15 22:53:47,164 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-04-15 22:53:47,165 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-04-15 22:53:47,172 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:47,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-15 22:53:47,177 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:47,177 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-15 22:53:47,182 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:47,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:47,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 22:53:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:47,208 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:47,209 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 22:53:47,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696959265] [2021-04-15 22:53:47,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 22:53:47,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 22:53:47,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216844706] [2021-04-15 22:53:47,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 22:53:47,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 22:53:47,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 22:53:47,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-04-15 22:53:47,211 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 22:53:47,396 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-04-15 22:53:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 22:53:47,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-04-15 22:53:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 22:53:47,398 INFO L225 Difference]: With dead ends: 30 [2021-04-15 22:53:47,398 INFO L226 Difference]: Without dead ends: 28 [2021-04-15 22:53:47,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-04-15 22:53:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-04-15 22:53:47,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-04-15 22:53:47,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-04-15 22:53:47,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-04-15 22:53:47,411 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2021-04-15 22:53:47,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 22:53:47,412 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-04-15 22:53:47,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:47,412 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-04-15 22:53:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 22:53:47,413 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 22:53:47,413 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 22:53:47,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 22:53:47,413 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 22:53:47,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 22:53:47,416 INFO L82 PathProgramCache]: Analyzing trace with hash -932371294, now seen corresponding path program 1 times [2021-04-15 22:53:47,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 22:53:47,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913857761] [2021-04-15 22:53:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 22:53:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:47,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:47,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:47,466 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:47,466 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-15 22:53:47,471 INFO L142 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-04-15 22:53:47,471 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-04-15 22:53:47,478 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:47,478 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-04-15 22:53:47,483 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:47,484 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-15 22:53:47,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:47,487 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-15 22:53:47,492 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:47,493 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:47,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 22:53:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:47,533 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:47,533 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:47,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-04-15 22:53:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:47,539 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:47,539 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 22:53:47,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913857761] [2021-04-15 22:53:47,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 22:53:47,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 22:53:47,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710278009] [2021-04-15 22:53:47,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 22:53:47,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 22:53:47,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 22:53:47,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-04-15 22:53:47,541 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-15 22:53:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 22:53:47,725 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-04-15 22:53:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 22:53:47,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-04-15 22:53:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 22:53:47,727 INFO L225 Difference]: With dead ends: 38 [2021-04-15 22:53:47,727 INFO L226 Difference]: Without dead ends: 36 [2021-04-15 22:53:47,728 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-04-15 22:53:47,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-04-15 22:53:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-04-15 22:53:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-04-15 22:53:47,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-04-15 22:53:47,739 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2021-04-15 22:53:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 22:53:47,739 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-04-15 22:53:47,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-15 22:53:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-04-15 22:53:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 22:53:47,740 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 22:53:47,740 INFO L519 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] [2021-04-15 22:53:47,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 22:53:47,740 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 22:53:47,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 22:53:47,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1861509246, now seen corresponding path program 1 times [2021-04-15 22:53:47,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 22:53:47,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039167389] [2021-04-15 22:53:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 22:53:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-15 22:53:47,761 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-15 22:53:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-15 22:53:47,775 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-15 22:53:47,794 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-04-15 22:53:47,794 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-15 22:53:47,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 22:53:47,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 10:53:47 BoogieIcfgContainer [2021-04-15 22:53:47,834 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 22:53:47,834 INFO L168 Benchmark]: Toolchain (without parser) took 2025.02 ms. Allocated memory is still 220.2 MB. Free memory was 184.2 MB in the beginning and 132.6 MB in the end (delta: 51.7 MB). Peak memory consumption was 52.3 MB. Max. memory is 8.0 GB. [2021-04-15 22:53:47,834 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 220.2 MB. Free memory is still 202.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-15 22:53:47,835 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.53 ms. Allocated memory is still 220.2 MB. Free memory was 184.0 MB in the beginning and 174.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-04-15 22:53:47,835 INFO L168 Benchmark]: Boogie Preprocessor took 42.50 ms. Allocated memory is still 220.2 MB. Free memory was 174.2 MB in the beginning and 203.8 MB in the end (delta: -29.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. [2021-04-15 22:53:47,835 INFO L168 Benchmark]: RCFGBuilder took 404.61 ms. Allocated memory is still 220.2 MB. Free memory was 203.8 MB in the beginning and 188.5 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-04-15 22:53:47,836 INFO L168 Benchmark]: TraceAbstraction took 1359.70 ms. Allocated memory is still 220.2 MB. Free memory was 188.1 MB in the beginning and 132.6 MB in the end (delta: 55.5 MB). Peak memory consumption was 55.9 MB. Max. memory is 8.0 GB. [2021-04-15 22:53:47,837 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 220.2 MB. Free memory is still 202.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 175.53 ms. Allocated memory is still 220.2 MB. Free memory was 184.0 MB in the beginning and 174.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.50 ms. Allocated memory is still 220.2 MB. Free memory was 174.2 MB in the beginning and 203.8 MB in the end (delta: -29.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 404.61 ms. Allocated memory is still 220.2 MB. Free memory was 203.8 MB in the beginning and 188.5 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1359.70 ms. Allocated memory is still 220.2 MB. Free memory was 188.1 MB in the beginning and 132.6 MB in the end (delta: 55.5 MB). Peak memory consumption was 55.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i=0, x=0, y=0; [L20] int n=__VERIFIER_nondet_int(); [L21] COND FALSE !(!(n>0)) [L22] i=0 VAL [i=0, n=1, x=0, y=0] [L22] COND TRUE i