/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/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:45:11,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:45:11,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:45:12,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:45:12,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:45:12,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:45:12,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:45:12,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:45:12,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:45:12,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:45:12,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:45:12,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:45:12,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:45:12,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:45:12,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:45:12,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:45:12,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:45:12,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:45:12,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:45:12,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:45:12,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:45:12,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:45:12,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:45:12,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:45:12,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:45:12,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:45:12,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:45:12,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:45:12,094 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:45:12,123 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:45:12,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:45:12,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:45:12,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:45:12,125 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:45:12,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:45:12,126 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:45:12,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:45:12,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:45:12,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:45:12,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:45:12,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:45:12,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:45:12,128 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:45:12,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:45:12,128 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:45:12,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:45:12,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:45:12,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:45:12,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:45:12,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:45:12,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:45:12,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:45:12,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:45:12,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:45:12,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:45:12,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:45:12,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:45:12,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:45:12,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:45:12,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:45:12,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:45:12,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:45:12,526 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:45:12,527 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:45:12,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-10-23 18:45:12,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83a86a8cc/6cce467aae0845b3a01d6475fa8767e3/FLAG858643e80 [2020-10-23 18:45:13,256 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:45:13,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-10-23 18:45:13,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83a86a8cc/6cce467aae0845b3a01d6475fa8767e3/FLAG858643e80 [2020-10-23 18:45:13,610 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83a86a8cc/6cce467aae0845b3a01d6475fa8767e3 [2020-10-23 18:45:13,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:45:13,620 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:45:13,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:45:13,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:45:13,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:45:13,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@604a61cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13, skipping insertion in model container [2020-10-23 18:45:13,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:45:13,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:45:13,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:45:13,851 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:45:13,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:45:13,892 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:45:13,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13 WrapperNode [2020-10-23 18:45:13,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:45:13,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:45:13,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:45:13,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:45:13,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... [2020-10-23 18:45:13,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:45:13,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:45:13,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:45:13,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:45:13,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:45:14,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:45:14,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:45:14,033 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:45:14,034 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:45:14,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:45:14,035 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:45:14,035 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:45:14,035 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:45:14,036 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:45:14,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:45:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:45:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:45:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:45:14,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:45:14,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:45:14,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:45:14,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:45:14,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:45:14,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:45:14,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:45:14,490 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:45:14,491 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:45:14,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:45:14 BoogieIcfgContainer [2020-10-23 18:45:14,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:45:14,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:45:14,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:45:14,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:45:14,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:45:13" (1/3) ... [2020-10-23 18:45:14,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320743d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:45:14, skipping insertion in model container [2020-10-23 18:45:14,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:13" (2/3) ... [2020-10-23 18:45:14,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320743d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:45:14, skipping insertion in model container [2020-10-23 18:45:14,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:45:14" (3/3) ... [2020-10-23 18:45:14,504 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt5.c [2020-10-23 18:45:14,517 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:45:14,522 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:45:14,536 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:45:14,613 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:45:14,613 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:45:14,614 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:45:14,614 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:45:14,614 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:45:14,614 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:45:14,614 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:45:14,614 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:45:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-23 18:45:14,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:45:14,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:14,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:14,650 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:14,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:14,669 INFO L82 PathProgramCache]: Analyzing trace with hash -362830247, now seen corresponding path program 1 times [2020-10-23 18:45:14,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:14,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720073706] [2020-10-23 18:45:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:15,099 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-23 18:45:15,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:15,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720073706] [2020-10-23 18:45:15,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:45:15,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:45:15,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767600006] [2020-10-23 18:45:15,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:45:15,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:15,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:45:15,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:45:15,178 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-23 18:45:15,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:15,273 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-23 18:45:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:45:15,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-23 18:45:15,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:15,285 INFO L225 Difference]: With dead ends: 42 [2020-10-23 18:45:15,285 INFO L226 Difference]: Without dead ends: 19 [2020-10-23 18:45:15,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:45:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-23 18:45:15,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-23 18:45:15,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-23 18:45:15,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-10-23 18:45:15,334 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2020-10-23 18:45:15,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:15,335 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-10-23 18:45:15,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:45:15,335 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-10-23 18:45:15,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:45:15,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:15,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:15,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:45:15,337 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1107188173, now seen corresponding path program 1 times [2020-10-23 18:45:15,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:15,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355597291] [2020-10-23 18:45:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:15,707 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-23 18:45:15,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:15,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355597291] [2020-10-23 18:45:15,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:45:15,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:45:15,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712416983] [2020-10-23 18:45:15,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:45:15,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:15,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:45:15,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:45:15,737 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 6 states. [2020-10-23 18:45:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:16,211 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-10-23 18:45:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:45:16,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-23 18:45:16,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:16,213 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:45:16,213 INFO L226 Difference]: Without dead ends: 21 [2020-10-23 18:45:16,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:45:16,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-23 18:45:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-23 18:45:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-23 18:45:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-10-23 18:45:16,223 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-10-23 18:45:16,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:16,224 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-10-23 18:45:16,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:45:16,224 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-10-23 18:45:16,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:45:16,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:16,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:16,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:45:16,226 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:16,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:16,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1577959002, now seen corresponding path program 1 times [2020-10-23 18:45:16,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:16,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619371131] [2020-10-23 18:45:16,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:16,537 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-10-23 18:45:16,881 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-23 18:45:17,028 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2020-10-23 18:45:17,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:17,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619371131] [2020-10-23 18:45:17,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038508210] [2020-10-23 18:45:17,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:17,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-23 18:45:17,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:17,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:17,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:17,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2020-10-23 18:45:17,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026514755] [2020-10-23 18:45:17,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:45:17,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:17,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:45:17,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:45:17,808 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 17 states. [2020-10-23 18:45:18,055 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-23 18:45:18,244 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-23 18:45:18,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:18,732 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2020-10-23 18:45:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:45:18,733 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2020-10-23 18:45:18,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:18,734 INFO L225 Difference]: With dead ends: 42 [2020-10-23 18:45:18,735 INFO L226 Difference]: Without dead ends: 27 [2020-10-23 18:45:18,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:45:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-23 18:45:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-23 18:45:18,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-23 18:45:18,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-23 18:45:18,750 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 16 [2020-10-23 18:45:18,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:18,750 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-23 18:45:18,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:45:18,751 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-23 18:45:18,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:45:18,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:18,753 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:18,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:45:18,969 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:18,970 INFO L82 PathProgramCache]: Analyzing trace with hash -466118030, now seen corresponding path program 1 times [2020-10-23 18:45:18,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:18,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200929045] [2020-10-23 18:45:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:19,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:19,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200929045] [2020-10-23 18:45:19,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358857010] [2020-10-23 18:45:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:19,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-23 18:45:19,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:20,509 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-23 18:45:21,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-23 18:45:23,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:23,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:23,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2020-10-23 18:45:23,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120317618] [2020-10-23 18:45:23,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 18:45:23,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:23,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 18:45:23,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:45:23,412 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 20 states. [2020-10-23 18:45:23,645 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-23 18:45:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:26,851 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-10-23 18:45:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:45:26,852 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2020-10-23 18:45:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:26,853 INFO L225 Difference]: With dead ends: 48 [2020-10-23 18:45:26,853 INFO L226 Difference]: Without dead ends: 33 [2020-10-23 18:45:26,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:45:26,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-23 18:45:26,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-23 18:45:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-23 18:45:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-23 18:45:26,861 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-10-23 18:45:26,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:26,861 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-23 18:45:26,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 18:45:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-23 18:45:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:45:26,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:26,863 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:27,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:27,078 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:27,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:27,079 INFO L82 PathProgramCache]: Analyzing trace with hash 449826944, now seen corresponding path program 1 times [2020-10-23 18:45:27,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:27,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997965168] [2020-10-23 18:45:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:27,763 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-10-23 18:45:28,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:28,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997965168] [2020-10-23 18:45:28,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028381754] [2020-10-23 18:45:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:28,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-23 18:45:28,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:28,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:28,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:28,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2020-10-23 18:45:28,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11412318] [2020-10-23 18:45:28,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 18:45:28,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:28,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 18:45:28,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:45:28,704 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 23 states. [2020-10-23 18:45:29,165 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-23 18:45:29,371 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-23 18:45:29,548 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-23 18:45:30,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:30,251 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2020-10-23 18:45:30,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:45:30,251 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 28 [2020-10-23 18:45:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:30,255 INFO L225 Difference]: With dead ends: 53 [2020-10-23 18:45:30,255 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:45:30,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 18:45:30,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:45:30,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 18:45:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:45:30,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-23 18:45:30,285 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2020-10-23 18:45:30,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:30,287 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-23 18:45:30,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 18:45:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-23 18:45:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:45:30,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:30,288 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:30,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:30,490 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:30,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:30,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1624955948, now seen corresponding path program 1 times [2020-10-23 18:45:30,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:30,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342878801] [2020-10-23 18:45:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:31,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:31,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342878801] [2020-10-23 18:45:31,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868642877] [2020-10-23 18:45:31,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:31,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-23 18:45:31,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:32,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:32,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:32,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2020-10-23 18:45:32,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437717708] [2020-10-23 18:45:32,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 18:45:32,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:32,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 18:45:32,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:45:32,189 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 27 states. [2020-10-23 18:45:32,684 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-23 18:45:32,914 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-23 18:45:33,101 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-23 18:45:33,367 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-23 18:45:33,552 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-23 18:45:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:34,305 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-10-23 18:45:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:45:34,305 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2020-10-23 18:45:34,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:34,307 INFO L225 Difference]: With dead ends: 57 [2020-10-23 18:45:34,307 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 18:45:34,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=177, Invalid=1383, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 18:45:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 18:45:34,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-23 18:45:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 18:45:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-23 18:45:34,317 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2020-10-23 18:45:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:34,318 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-23 18:45:34,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 18:45:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-23 18:45:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 18:45:34,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:34,319 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:34,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:34,522 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:34,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:34,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1048798439, now seen corresponding path program 1 times [2020-10-23 18:45:34,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:34,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809264811] [2020-10-23 18:45:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:35,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:35,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809264811] [2020-10-23 18:45:35,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265842998] [2020-10-23 18:45:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:35,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-23 18:45:35,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:37,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:37,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:45:37,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:45:37,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:37,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:37,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 33 [2020-10-23 18:45:37,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837345859] [2020-10-23 18:45:37,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-23 18:45:37,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:37,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-23 18:45:37,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 18:45:37,201 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 33 states. [2020-10-23 18:45:37,467 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-23 18:45:39,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:39,538 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-23 18:45:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:45:39,541 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-10-23 18:45:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:39,542 INFO L225 Difference]: With dead ends: 60 [2020-10-23 18:45:39,542 INFO L226 Difference]: Without dead ends: 45 [2020-10-23 18:45:39,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=242, Invalid=2014, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 18:45:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-23 18:45:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-23 18:45:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-23 18:45:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-23 18:45:39,563 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 37 [2020-10-23 18:45:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:39,563 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-23 18:45:39,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-23 18:45:39,564 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-23 18:45:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 18:45:39,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:39,568 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:39,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-23 18:45:39,784 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:39,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash 478254706, now seen corresponding path program 2 times [2020-10-23 18:45:39,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:39,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231440969] [2020-10-23 18:45:39,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:41,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:41,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231440969] [2020-10-23 18:45:41,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515145997] [2020-10-23 18:45:41,426 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:41,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:45:41,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:45:41,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-23 18:45:41,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:43,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:43,098 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:45:43,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:45:43,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:43,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:43,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 37 [2020-10-23 18:45:43,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029749852] [2020-10-23 18:45:43,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-23 18:45:43,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:43,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-23 18:45:43,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 18:45:43,307 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 37 states. [2020-10-23 18:45:43,594 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-23 18:45:45,970 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-10-23 18:45:46,254 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-23 18:45:46,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:46,885 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-10-23 18:45:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 18:45:46,886 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-10-23 18:45:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:46,890 INFO L225 Difference]: With dead ends: 65 [2020-10-23 18:45:46,890 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:45:46,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=281, Invalid=2689, Unknown=0, NotChecked=0, Total=2970 [2020-10-23 18:45:46,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:45:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-23 18:45:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 18:45:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-23 18:45:46,904 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 40 [2020-10-23 18:45:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:46,904 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-23 18:45:46,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-23 18:45:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-23 18:45:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:45:46,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:46,909 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:47,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:47,127 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:47,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:47,128 INFO L82 PathProgramCache]: Analyzing trace with hash -876919518, now seen corresponding path program 3 times [2020-10-23 18:45:47,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:47,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914465904] [2020-10-23 18:45:47,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:48,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:49,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914465904] [2020-10-23 18:45:49,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167183313] [2020-10-23 18:45:49,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true