/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/sumt7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:47:00,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:47:00,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:47:00,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:47:00,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:47:00,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:47:00,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:47:00,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:47:00,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:47:00,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:47:00,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:47:00,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:47:00,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:47:00,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:47:00,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:47:00,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:47:00,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:47:00,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:47:00,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:47:00,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:47:00,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:47:00,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:47:00,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:47:00,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:47:00,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:47:00,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:47:00,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:47:00,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:47:00,680 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 [2020-11-06 22:47:00,734 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:47:00,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:47:00,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:47:00,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:47:00,740 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:47:00,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:47:00,741 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:47:00,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:47:00,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:47:00,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:47:00,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:47:00,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:47:00,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:47:00,743 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:47:00,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:47:00,743 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:47:00,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:47:00,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:47:00,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:47:00,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:47:00,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:47:00,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:47:00,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:47:00,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:47:00,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:47:00,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:47:00,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:47:00,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:47:00,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:47:00,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:47:01,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:47:01,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:47:01,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:47:01,252 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:47:01,252 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:47:01,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-11-06 22:47:01,327 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/275ba564b/4e7ff192c88b4d3b8cbebee1084fafae/FLAGf38fd0ce4 [2020-11-06 22:47:01,962 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:47:01,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-11-06 22:47:01,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/275ba564b/4e7ff192c88b4d3b8cbebee1084fafae/FLAGf38fd0ce4 [2020-11-06 22:47:02,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/275ba564b/4e7ff192c88b4d3b8cbebee1084fafae [2020-11-06 22:47:02,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:47:02,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:47:02,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:47:02,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:47:02,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:47:02,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f9994b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02, skipping insertion in model container [2020-11-06 22:47:02,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:47:02,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:47:02,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:47:02,625 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:47:02,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:47:02,686 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:47:02,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02 WrapperNode [2020-11-06 22:47:02,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:47:02,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:47:02,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:47:02,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:47:02,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:47:02,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:47:02,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:47:02,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:47:02,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (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 [2020-11-06 22:47:02,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:47:02,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:47:02,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:47:02,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:47:02,868 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:47:02,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:47:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:47:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:47:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:47:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:47:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:47:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:47:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:47:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:47:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:47:02,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:47:02,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:47:02,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:47:02,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:47:02,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:47:03,373 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:47:03,373 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:47:03,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:03 BoogieIcfgContainer [2020-11-06 22:47:03,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:47:03,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:47:03,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:47:03,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:47:03,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:02" (1/3) ... [2020-11-06 22:47:03,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1826e1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:03, skipping insertion in model container [2020-11-06 22:47:03,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (2/3) ... [2020-11-06 22:47:03,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1826e1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:03, skipping insertion in model container [2020-11-06 22:47:03,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:03" (3/3) ... [2020-11-06 22:47:03,390 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt7.c [2020-11-06 22:47:03,407 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:47:03,411 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:47:03,423 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:47:03,451 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:47:03,451 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:47:03,451 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:47:03,451 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:47:03,451 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:47:03,452 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:47:03,452 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:47:03,452 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:47:03,470 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-06 22:47:03,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:47:03,476 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:03,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:03,477 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:03,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:03,484 INFO L82 PathProgramCache]: Analyzing trace with hash 670636958, now seen corresponding path program 1 times [2020-11-06 22:47:03,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:03,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640735793] [2020-11-06 22:47:03,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:04,080 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-11-06 22:47:04,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:04,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640735793] [2020-11-06 22:47:04,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:47:04,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:47:04,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796291402] [2020-11-06 22:47:04,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:47:04,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:04,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:47:04,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:47:04,195 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 8 states. [2020-11-06 22:47:04,674 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-06 22:47:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:07,211 INFO L93 Difference]: Finished difference Result 71 states and 101 transitions. [2020-11-06 22:47:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:47:07,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-06 22:47:07,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:07,222 INFO L225 Difference]: With dead ends: 71 [2020-11-06 22:47:07,222 INFO L226 Difference]: Without dead ends: 36 [2020-11-06 22:47:07,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:47:07,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-06 22:47:07,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-11-06 22:47:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-06 22:47:07,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-11-06 22:47:07,278 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 15 [2020-11-06 22:47:07,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:07,279 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-11-06 22:47:07,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:47:07,279 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-11-06 22:47:07,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:47:07,280 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:07,281 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:07,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:47:07,281 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:07,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:07,282 INFO L82 PathProgramCache]: Analyzing trace with hash 506448450, now seen corresponding path program 1 times [2020-11-06 22:47:07,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:07,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117131534] [2020-11-06 22:47:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:07,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:07,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:07,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117131534] [2020-11-06 22:47:07,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915487317] [2020-11-06 22:47:07,530 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 [2020-11-06 22:47:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:07,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-06 22:47:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:07,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:07,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2020-11-06 22:47:07,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270392393] [2020-11-06 22:47:07,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:47:07,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:07,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:47:07,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:47:07,883 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 12 states. [2020-11-06 22:47:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:08,545 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-11-06 22:47:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:47:08,546 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-11-06 22:47:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:08,547 INFO L225 Difference]: With dead ends: 55 [2020-11-06 22:47:08,547 INFO L226 Difference]: Without dead ends: 39 [2020-11-06 22:47:08,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:47:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-06 22:47:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-11-06 22:47:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-06 22:47:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-11-06 22:47:08,560 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 23 [2020-11-06 22:47:08,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:08,560 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-11-06 22:47:08,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:47:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-11-06 22:47:08,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-06 22:47:08,562 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:08,562 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] [2020-11-06 22:47:08,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:47:08,777 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:08,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:08,779 INFO L82 PathProgramCache]: Analyzing trace with hash -882654766, now seen corresponding path program 1 times [2020-11-06 22:47:08,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:08,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509429409] [2020-11-06 22:47:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:09,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:09,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:09,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509429409] [2020-11-06 22:47:09,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004804008] [2020-11-06 22:47:09,328 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 [2020-11-06 22:47:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:09,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-06 22:47:09,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:09,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:09,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:09,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-11-06 22:47:09,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211393146] [2020-11-06 22:47:09,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:47:09,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:09,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:47:09,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:47:09,631 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 15 states. [2020-11-06 22:47:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:10,513 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2020-11-06 22:47:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:47:10,514 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-11-06 22:47:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:10,515 INFO L225 Difference]: With dead ends: 67 [2020-11-06 22:47:10,515 INFO L226 Difference]: Without dead ends: 51 [2020-11-06 22:47:10,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:47:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-06 22:47:10,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-06 22:47:10,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-06 22:47:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-11-06 22:47:10,545 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 28 [2020-11-06 22:47:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:10,546 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-11-06 22:47:10,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:47:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-11-06 22:47:10,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-06 22:47:10,547 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:10,548 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:10,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:10,758 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:10,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:10,759 INFO L82 PathProgramCache]: Analyzing trace with hash -868787812, now seen corresponding path program 1 times [2020-11-06 22:47:10,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:10,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376437951] [2020-11-06 22:47:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:11,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:11,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:11,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:47:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:47:11,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376437951] [2020-11-06 22:47:11,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678790628] [2020-11-06 22:47:11,335 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 [2020-11-06 22:47:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:11,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-06 22:47:11,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:11,647 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:47:11,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:11,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2020-11-06 22:47:11,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306587712] [2020-11-06 22:47:11,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 22:47:11,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:11,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 22:47:11,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:47:11,726 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 19 states. [2020-11-06 22:47:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:13,024 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2020-11-06 22:47:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:47:13,025 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-11-06 22:47:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:13,028 INFO L225 Difference]: With dead ends: 79 [2020-11-06 22:47:13,028 INFO L226 Difference]: Without dead ends: 63 [2020-11-06 22:47:13,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2020-11-06 22:47:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-06 22:47:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-06 22:47:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-06 22:47:13,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-11-06 22:47:13,055 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 41 [2020-11-06 22:47:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:13,055 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-11-06 22:47:13,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 22:47:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-11-06 22:47:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-06 22:47:13,060 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:13,060 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:13,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:13,274 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:13,275 INFO L82 PathProgramCache]: Analyzing trace with hash -944025398, now seen corresponding path program 1 times [2020-11-06 22:47:13,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:13,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000018656] [2020-11-06 22:47:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:13,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:13,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:13,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:47:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:13,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:47:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-06 22:47:13,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000018656] [2020-11-06 22:47:13,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234582293] [2020-11-06 22:47:13,807 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 [2020-11-06 22:47:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:13,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-06 22:47:13,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:14,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-06 22:47:14,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:14,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2020-11-06 22:47:14,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237005177] [2020-11-06 22:47:14,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-06 22:47:14,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:14,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-06 22:47:14,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:47:14,297 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 23 states. [2020-11-06 22:47:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:15,717 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-11-06 22:47:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 22:47:15,724 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-11-06 22:47:15,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:15,726 INFO L225 Difference]: With dead ends: 90 [2020-11-06 22:47:15,726 INFO L226 Difference]: Without dead ends: 74 [2020-11-06 22:47:15,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2020-11-06 22:47:15,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-06 22:47:15,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-11-06 22:47:15,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-06 22:47:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-11-06 22:47:15,742 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 53 [2020-11-06 22:47:15,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:15,742 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-11-06 22:47:15,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-06 22:47:15,743 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-11-06 22:47:15,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-06 22:47:15,744 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:15,744 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:15,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:15,958 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:15,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:15,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1099424193, now seen corresponding path program 1 times [2020-11-06 22:47:15,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:15,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118628053] [2020-11-06 22:47:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:16,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:16,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:16,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:47:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:16,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:47:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:16,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-11-06 22:47:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-06 22:47:16,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118628053] [2020-11-06 22:47:16,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832171754] [2020-11-06 22:47:16,652 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 [2020-11-06 22:47:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:16,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-06 22:47:16,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:17,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-06 22:47:17,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:17,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2020-11-06 22:47:17,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217472360] [2020-11-06 22:47:17,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-06 22:47:17,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:17,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-06 22:47:17,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-11-06 22:47:17,357 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 27 states. [2020-11-06 22:47:19,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:19,247 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2020-11-06 22:47:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:47:19,247 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-11-06 22:47:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:19,250 INFO L225 Difference]: With dead ends: 100 [2020-11-06 22:47:19,250 INFO L226 Difference]: Without dead ends: 84 [2020-11-06 22:47:19,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2020-11-06 22:47:19,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-06 22:47:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-11-06 22:47:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-06 22:47:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-11-06 22:47:19,271 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 64 [2020-11-06 22:47:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:19,271 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-11-06 22:47:19,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-06 22:47:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-11-06 22:47:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-06 22:47:19,275 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:19,275 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:19,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 22:47:19,489 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:19,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:19,490 INFO L82 PathProgramCache]: Analyzing trace with hash -71800728, now seen corresponding path program 1 times [2020-11-06 22:47:19,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:19,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611849607] [2020-11-06 22:47:19,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:20,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:20,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:20,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:47:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:20,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:47:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:20,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-11-06 22:47:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:20,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-11-06 22:47:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-06 22:47:20,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611849607] [2020-11-06 22:47:20,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266880392] [2020-11-06 22:47:20,233 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 [2020-11-06 22:47:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:20,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-06 22:47:20,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:20,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-06 22:47:21,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:21,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2020-11-06 22:47:21,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305941161] [2020-11-06 22:47:21,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-06 22:47:21,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:21,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-06 22:47:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2020-11-06 22:47:21,006 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 31 states. [2020-11-06 22:47:23,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:23,107 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2020-11-06 22:47:23,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:47:23,108 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 74 [2020-11-06 22:47:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:23,110 INFO L225 Difference]: With dead ends: 109 [2020-11-06 22:47:23,110 INFO L226 Difference]: Without dead ends: 93 [2020-11-06 22:47:23,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=250, Invalid=1912, Unknown=0, NotChecked=0, Total=2162 [2020-11-06 22:47:23,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-06 22:47:23,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-11-06 22:47:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-06 22:47:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2020-11-06 22:47:23,126 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 74 [2020-11-06 22:47:23,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:23,127 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2020-11-06 22:47:23,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-06 22:47:23,127 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2020-11-06 22:47:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-06 22:47:23,128 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:23,129 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 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] [2020-11-06 22:47:23,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:23,342 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:23,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:23,343 INFO L82 PathProgramCache]: Analyzing trace with hash -570833668, now seen corresponding path program 1 times [2020-11-06 22:47:23,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:23,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519211382] [2020-11-06 22:47:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:24,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:24,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:24,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:47:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:24,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:47:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:24,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-11-06 22:47:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:24,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-11-06 22:47:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:24,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-11-06 22:47:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 12 proven. 119 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-11-06 22:47:24,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519211382] [2020-11-06 22:47:24,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674191500] [2020-11-06 22:47:24,272 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 [2020-11-06 22:47:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:24,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 47 conjunts are in the unsatisfiable core [2020-11-06 22:47:24,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:25,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 12 proven. 119 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-11-06 22:47:25,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:25,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2020-11-06 22:47:25,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495888766] [2020-11-06 22:47:25,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-06 22:47:25,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:25,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-06 22:47:25,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2020-11-06 22:47:25,154 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand 35 states. [2020-11-06 22:47:27,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:27,814 INFO L93 Difference]: Finished difference Result 126 states and 147 transitions. [2020-11-06 22:47:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-06 22:47:27,815 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 83 [2020-11-06 22:47:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:27,817 INFO L225 Difference]: With dead ends: 126 [2020-11-06 22:47:27,817 INFO L226 Difference]: Without dead ends: 110 [2020-11-06 22:47:27,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=330, Invalid=2640, Unknown=0, NotChecked=0, Total=2970 [2020-11-06 22:47:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-06 22:47:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2020-11-06 22:47:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-06 22:47:27,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2020-11-06 22:47:27,840 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 83 [2020-11-06 22:47:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:27,841 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2020-11-06 22:47:27,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-06 22:47:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2020-11-06 22:47:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-11-06 22:47:27,844 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:27,844 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 6, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:28,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:28,058 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:28,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1973273156, now seen corresponding path program 2 times [2020-11-06 22:47:28,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:28,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901076529] [2020-11-06 22:47:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:28,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:28,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:28,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:47:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:28,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:47:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:28,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-11-06 22:47:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:28,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-11-06 22:47:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:28,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-11-06 22:47:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:28,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-11-06 22:47:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:28,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-11-06 22:47:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 32 proven. 163 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-11-06 22:47:28,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901076529] [2020-11-06 22:47:28,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285731957] [2020-11-06 22:47:28,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true