/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:26:29,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:26:29,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:26:29,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:26:29,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:26:29,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:26:29,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:26:29,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:26:29,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:26:29,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:26:29,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:26:29,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:26:29,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:26:29,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:26:29,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:26:29,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:26:29,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:26:29,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:26:29,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:26:29,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:26:29,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:26:29,847 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:26:29,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:26:29,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:26:29,849 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:26:29,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:26:29,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:26:29,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:26:29,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:26:29,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:26:29,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:26:29,850 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:26:29,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:26:29,851 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:26:29,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:26:29,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:26:29,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:26:29,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:26:29,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:26:29,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:26:29,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:26:29,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:26:29,852 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:26:29,852 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:26:30,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:26:30,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:26:30,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:26:30,136 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:26:30,137 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:26:30,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound100.c [2021-05-06 07:26:30,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa8e84824/21cb11dae0aa4dac9bb9874f5986b970/FLAGda7e014e5 [2021-05-06 07:26:30,469 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:26:30,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound100.c [2021-05-06 07:26:30,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa8e84824/21cb11dae0aa4dac9bb9874f5986b970/FLAGda7e014e5 [2021-05-06 07:26:30,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa8e84824/21cb11dae0aa4dac9bb9874f5986b970 [2021-05-06 07:26:30,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:26:30,900 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:26:30,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:26:30,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:26:30,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:26:30,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:26:30" (1/1) ... [2021-05-06 07:26:30,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9c3360c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:30, skipping insertion in model container [2021-05-06 07:26:30,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:26:30" (1/1) ... [2021-05-06 07:26:30,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:26:30,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:26:31,007 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound100.c[576,589] [2021-05-06 07:26:31,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:26:31,026 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:26:31,069 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound100.c[576,589] [2021-05-06 07:26:31,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:26:31,100 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:26:31,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:31 WrapperNode [2021-05-06 07:26:31,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:26:31,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:26:31,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:26:31,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:26:31,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:31" (1/1) ... [2021-05-06 07:26:31,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:31" (1/1) ... [2021-05-06 07:26:31,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:31" (1/1) ... [2021-05-06 07:26:31,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:31" (1/1) ... [2021-05-06 07:26:31,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:31" (1/1) ... [2021-05-06 07:26:31,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:31" (1/1) ... [2021-05-06 07:26:31,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:31" (1/1) ... [2021-05-06 07:26:31,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:26:31,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:26:31,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:26:31,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:26:31,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:26:31,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:26:31,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:26:31,246 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:26:31,246 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:26:31,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:26:31,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:26:31,247 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:26:31,247 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:26:31,247 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:26:31,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:26:31,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:26:31,247 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:26:31,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:26:31,247 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:26:31,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:26:31,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:26:31,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:26:31,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:26:31,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:26:31,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:26:31,478 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:26:31,479 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:26:31,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:31 BoogieIcfgContainer [2021-05-06 07:26:31,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:26:31,480 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:26:31,480 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:26:31,481 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:26:31,482 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:31" (1/1) ... [2021-05-06 07:26:31,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:26:31 BasicIcfg [2021-05-06 07:26:31,506 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:26:31,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:26:31,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:26:31,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:26:31,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:26:30" (1/4) ... [2021-05-06 07:26:31,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7495e0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:26:31, skipping insertion in model container [2021-05-06 07:26:31,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:31" (2/4) ... [2021-05-06 07:26:31,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7495e0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:26:31, skipping insertion in model container [2021-05-06 07:26:31,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:31" (3/4) ... [2021-05-06 07:26:31,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7495e0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:26:31, skipping insertion in model container [2021-05-06 07:26:31,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:26:31" (4/4) ... [2021-05-06 07:26:31,510 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound100.cJordan [2021-05-06 07:26:31,514 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:26:31,517 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:26:31,526 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:26:31,546 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:26:31,546 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:26:31,546 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:26:31,546 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:26:31,546 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:26:31,546 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:26:31,546 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:26:31,547 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:26:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 07:26:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:26:31,563 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:31,563 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:31,564 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:31,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:31,571 INFO L82 PathProgramCache]: Analyzing trace with hash 795680375, now seen corresponding path program 1 times [2021-05-06 07:26:31,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:31,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493998342] [2021-05-06 07:26:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:31,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:26:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:31,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:26:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:31,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 07:26:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:31,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 07:26:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 07:26:31,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:31,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493998342] [2021-05-06 07:26:31,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493998342] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:31,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:31,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:26:31,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120448355] [2021-05-06 07:26:31,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:26:31,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:31,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:26:31,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:26:31,790 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:26:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:31,880 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-06 07:26:31,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:26:31,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 07:26:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:31,886 INFO L225 Difference]: With dead ends: 39 [2021-05-06 07:26:31,886 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:26:31,887 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:26:31,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:26:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 07:26:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 07:26:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-06 07:26:31,908 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2021-05-06 07:26:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:31,909 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-06 07:26:31,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:26:31,909 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-06 07:26:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:26:31,910 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:31,910 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:31,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:26:31,910 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:31,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:31,911 INFO L82 PathProgramCache]: Analyzing trace with hash 797557208, now seen corresponding path program 1 times [2021-05-06 07:26:31,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:31,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245697827] [2021-05-06 07:26:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:31,922 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:31,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204770393] [2021-05-06 07:26:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:31,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:26:31,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:32,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:32,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:32,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:32,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:32,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 07:26:32,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:32,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245697827] [2021-05-06 07:26:32,108 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:32,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204770393] [2021-05-06 07:26:32,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204770393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:32,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:32,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 07:26:32,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135167352] [2021-05-06 07:26:32,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:26:32,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:32,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:26:32,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:32,110 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:26:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:32,216 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-06 07:26:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:26:32,217 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 07:26:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:32,220 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:26:32,220 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 07:26:32,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 07:26:32,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 07:26:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 07:26:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-06 07:26:32,239 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2021-05-06 07:26:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:32,239 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-06 07:26:32,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:26:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-06 07:26:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 07:26:32,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:32,241 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:32,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:26:32,460 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:32,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:32,461 INFO L82 PathProgramCache]: Analyzing trace with hash 648866686, now seen corresponding path program 1 times [2021-05-06 07:26:32,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:32,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484849717] [2021-05-06 07:26:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:32,474 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:32,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561101550] [2021-05-06 07:26:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:32,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:26:32,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:32,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:32,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:32,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:32,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:32,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:32,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:32,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 07:26:32,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:32,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484849717] [2021-05-06 07:26:32,755 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:32,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561101550] [2021-05-06 07:26:32,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561101550] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:32,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:32,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 07:26:32,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112267130] [2021-05-06 07:26:32,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:26:32,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:32,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:26:32,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:32,756 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:26:32,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:32,845 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2021-05-06 07:26:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:26:32,846 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-05-06 07:26:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:32,847 INFO L225 Difference]: With dead ends: 55 [2021-05-06 07:26:32,847 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 07:26:32,847 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:32,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 07:26:32,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 07:26:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 07:26:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-05-06 07:26:32,852 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2021-05-06 07:26:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:32,853 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-05-06 07:26:32,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:26:32,853 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-05-06 07:26:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 07:26:32,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:32,854 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:33,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:33,075 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:33,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:33,075 INFO L82 PathProgramCache]: Analyzing trace with hash 619469170, now seen corresponding path program 1 times [2021-05-06 07:26:33,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:33,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600797691] [2021-05-06 07:26:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:33,085 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:33,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884422038] [2021-05-06 07:26:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:33,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:26:33,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:33,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 07:26:33,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:33,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600797691] [2021-05-06 07:26:33,203 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:33,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884422038] [2021-05-06 07:26:33,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884422038] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:33,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:33,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:26:33,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487894592] [2021-05-06 07:26:33,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:26:33,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:33,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:26:33,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:26:33,204 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 07:26:33,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:33,246 INFO L93 Difference]: Finished difference Result 77 states and 103 transitions. [2021-05-06 07:26:33,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:26:33,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2021-05-06 07:26:33,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:33,247 INFO L225 Difference]: With dead ends: 77 [2021-05-06 07:26:33,248 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 07:26:33,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:26:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 07:26:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2021-05-06 07:26:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 07:26:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2021-05-06 07:26:33,254 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 40 [2021-05-06 07:26:33,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:33,254 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2021-05-06 07:26:33,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 07:26:33,254 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2021-05-06 07:26:33,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 07:26:33,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:33,255 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:33,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:33,472 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:33,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:33,473 INFO L82 PathProgramCache]: Analyzing trace with hash -574143214, now seen corresponding path program 1 times [2021-05-06 07:26:33,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:33,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114008959] [2021-05-06 07:26:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:33,482 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:33,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554295359] [2021-05-06 07:26:33,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:26:33,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:33,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-06 07:26:33,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:33,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114008959] [2021-05-06 07:26:33,628 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:33,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554295359] [2021-05-06 07:26:33,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554295359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:33,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:33,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:26:33,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264611372] [2021-05-06 07:26:33,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:33,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:33,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:33,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:33,629 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 07:26:33,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:33,696 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2021-05-06 07:26:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:33,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-05-06 07:26:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:33,698 INFO L225 Difference]: With dead ends: 74 [2021-05-06 07:26:33,698 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 07:26:33,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:33,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 07:26:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 07:26:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 07:26:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-05-06 07:26:33,703 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 50 [2021-05-06 07:26:33,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:33,704 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-05-06 07:26:33,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 07:26:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-05-06 07:26:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 07:26:33,705 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:33,705 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:33,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:33,922 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:33,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:33,922 INFO L82 PathProgramCache]: Analyzing trace with hash -810208713, now seen corresponding path program 1 times [2021-05-06 07:26:33,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:33,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121892282] [2021-05-06 07:26:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:33,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:33,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501868871] [2021-05-06 07:26:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:34,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:26:34,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:34,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 07:26:34,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:34,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121892282] [2021-05-06 07:26:34,124 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:34,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501868871] [2021-05-06 07:26:34,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501868871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:34,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:34,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:26:34,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247295326] [2021-05-06 07:26:34,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:34,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:34,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:34,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:34,125 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 07:26:34,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:34,202 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2021-05-06 07:26:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:34,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-05-06 07:26:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:34,203 INFO L225 Difference]: With dead ends: 78 [2021-05-06 07:26:34,203 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 07:26:34,204 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:34,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 07:26:34,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 07:26:34,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 07:26:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2021-05-06 07:26:34,209 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 56 [2021-05-06 07:26:34,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:34,209 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2021-05-06 07:26:34,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 07:26:34,210 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2021-05-06 07:26:34,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 07:26:34,210 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:34,210 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:34,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:26:34,428 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:34,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:34,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1603019557, now seen corresponding path program 1 times [2021-05-06 07:26:34,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:34,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954254024] [2021-05-06 07:26:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:34,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:34,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344537222] [2021-05-06 07:26:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:34,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:26:34,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:34,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 07:26:34,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:34,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954254024] [2021-05-06 07:26:34,621 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:34,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344537222] [2021-05-06 07:26:34,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344537222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:34,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:34,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:26:34,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103700048] [2021-05-06 07:26:34,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:26:34,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:34,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:26:34,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:26:34,622 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 07:26:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:34,706 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2021-05-06 07:26:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:26:34,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2021-05-06 07:26:34,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:34,707 INFO L225 Difference]: With dead ends: 109 [2021-05-06 07:26:34,708 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 07:26:34,708 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:34,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 07:26:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2021-05-06 07:26:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 60 states have internal predecessors, (66), 34 states have call successors, (34), 11 states have call predecessors, (34), 10 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 07:26:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2021-05-06 07:26:34,714 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 63 [2021-05-06 07:26:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:34,715 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2021-05-06 07:26:34,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 07:26:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2021-05-06 07:26:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 07:26:34,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:34,716 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:34,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:34,933 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:34,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:34,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1439194403, now seen corresponding path program 1 times [2021-05-06 07:26:34,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:34,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278559454] [2021-05-06 07:26:34,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:34,942 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:34,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291407623] [2021-05-06 07:26:34,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:35,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 07:26:35,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:35,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-05-06 07:26:35,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:35,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278559454] [2021-05-06 07:26:35,160 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:35,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291407623] [2021-05-06 07:26:35,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291407623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:35,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:35,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:26:35,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037657251] [2021-05-06 07:26:35,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:35,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:35,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:35,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:35,161 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 07:26:35,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:35,272 INFO L93 Difference]: Finished difference Result 141 states and 186 transitions. [2021-05-06 07:26:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:35,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2021-05-06 07:26:35,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:35,273 INFO L225 Difference]: With dead ends: 141 [2021-05-06 07:26:35,273 INFO L226 Difference]: Without dead ends: 140 [2021-05-06 07:26:35,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-06 07:26:35,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 117. [2021-05-06 07:26:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 69 states have internal predecessors, (75), 39 states have call successors, (39), 12 states have call predecessors, (39), 11 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 07:26:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 151 transitions. [2021-05-06 07:26:35,282 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 151 transitions. Word has length 86 [2021-05-06 07:26:35,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:35,282 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 151 transitions. [2021-05-06 07:26:35,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 07:26:35,282 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 151 transitions. [2021-05-06 07:26:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 07:26:35,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:35,283 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:35,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:35,501 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:35,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:35,502 INFO L82 PathProgramCache]: Analyzing trace with hash -120599176, now seen corresponding path program 2 times [2021-05-06 07:26:35,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:35,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093521339] [2021-05-06 07:26:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:35,510 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:35,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496617817] [2021-05-06 07:26:35,510 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 [2021-05-06 07:26:35,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:26:35,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:35,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 07:26:35,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:35,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-06 07:26:35,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:35,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093521339] [2021-05-06 07:26:35,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:35,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496617817] [2021-05-06 07:26:35,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496617817] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:35,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:35,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:26:35,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183348657] [2021-05-06 07:26:35,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:26:35,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:26:35,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:26:35,708 INFO L87 Difference]: Start difference. First operand 117 states and 151 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 07:26:35,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:35,739 INFO L93 Difference]: Finished difference Result 126 states and 163 transitions. [2021-05-06 07:26:35,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:26:35,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2021-05-06 07:26:35,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:35,740 INFO L225 Difference]: With dead ends: 126 [2021-05-06 07:26:35,740 INFO L226 Difference]: Without dead ends: 121 [2021-05-06 07:26:35,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:26:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-06 07:26:35,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2021-05-06 07:26:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 65 states have (on average 1.123076923076923) internal successors, (73), 66 states have internal predecessors, (73), 39 states have call successors, (39), 12 states have call predecessors, (39), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 07:26:35,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 149 transitions. [2021-05-06 07:26:35,746 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 149 transitions. Word has length 93 [2021-05-06 07:26:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:35,746 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 149 transitions. [2021-05-06 07:26:35,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 07:26:35,746 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 149 transitions. [2021-05-06 07:26:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 07:26:35,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:35,747 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:35,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 07:26:35,964 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:35,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2120729957, now seen corresponding path program 2 times [2021-05-06 07:26:35,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:35,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58061100] [2021-05-06 07:26:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:35,972 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:35,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46053981] [2021-05-06 07:26:35,972 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:36,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:26:36,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:36,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 07:26:36,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:36,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 45 proven. 42 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-05-06 07:26:36,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:36,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58061100] [2021-05-06 07:26:36,768 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:36,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46053981] [2021-05-06 07:26:36,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46053981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:36,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:36,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 07:26:36,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725548027] [2021-05-06 07:26:36,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 07:26:36,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:36,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 07:26:36,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:26:36,769 INFO L87 Difference]: Start difference. First operand 116 states and 149 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 07:26:37,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:37,324 INFO L93 Difference]: Finished difference Result 154 states and 203 transitions. [2021-05-06 07:26:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 07:26:37,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 109 [2021-05-06 07:26:37,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:37,326 INFO L225 Difference]: With dead ends: 154 [2021-05-06 07:26:37,326 INFO L226 Difference]: Without dead ends: 153 [2021-05-06 07:26:37,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-06 07:26:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-06 07:26:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 127. [2021-05-06 07:26:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 72 states have internal predecessors, (80), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 07:26:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 164 transitions. [2021-05-06 07:26:37,337 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 164 transitions. Word has length 109 [2021-05-06 07:26:37,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:37,338 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 164 transitions. [2021-05-06 07:26:37,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 07:26:37,338 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 164 transitions. [2021-05-06 07:26:37,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 07:26:37,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:37,339 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:37,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:37,540 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:37,541 INFO L82 PathProgramCache]: Analyzing trace with hash 435194, now seen corresponding path program 3 times [2021-05-06 07:26:37,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:37,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243286667] [2021-05-06 07:26:37,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:37,556 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:37,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44930664] [2021-05-06 07:26:37,556 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:37,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 07:26:37,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:37,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 07:26:37,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:37,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 123 proven. 35 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-05-06 07:26:37,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:37,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243286667] [2021-05-06 07:26:37,788 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:37,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44930664] [2021-05-06 07:26:37,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44930664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:37,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:37,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:26:37,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165978866] [2021-05-06 07:26:37,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:26:37,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:37,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:26:37,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:26:37,790 INFO L87 Difference]: Start difference. First operand 127 states and 164 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 07:26:38,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:38,035 INFO L93 Difference]: Finished difference Result 135 states and 174 transitions. [2021-05-06 07:26:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:26:38,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) Word has length 116 [2021-05-06 07:26:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:38,036 INFO L225 Difference]: With dead ends: 135 [2021-05-06 07:26:38,036 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:26:38,036 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-06 07:26:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:26:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:26:38,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 07:26:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:26:38,037 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2021-05-06 07:26:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:38,037 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:26:38,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 07:26:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:26:38,037 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:26:38,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:38,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:26:38 BasicIcfg [2021-05-06 07:26:38,258 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:26:38,259 INFO L168 Benchmark]: Toolchain (without parser) took 7358.46 ms. Allocated memory was 183.5 MB in the beginning and 311.4 MB in the end (delta: 127.9 MB). Free memory was 148.2 MB in the beginning and 145.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 130.3 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:38,259 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 183.5 MB. Free memory is still 164.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:26:38,259 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.31 ms. Allocated memory is still 183.5 MB. Free memory was 147.8 MB in the beginning and 166.0 MB in the end (delta: -18.2 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:38,259 INFO L168 Benchmark]: Boogie Preprocessor took 42.43 ms. Allocated memory is still 183.5 MB. Free memory was 166.0 MB in the beginning and 164.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:38,259 INFO L168 Benchmark]: RCFGBuilder took 330.60 ms. Allocated memory is still 183.5 MB. Free memory was 164.6 MB in the beginning and 148.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:38,259 INFO L168 Benchmark]: IcfgTransformer took 25.74 ms. Allocated memory is still 183.5 MB. Free memory was 148.9 MB in the beginning and 147.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:38,259 INFO L168 Benchmark]: TraceAbstraction took 6751.61 ms. Allocated memory was 183.5 MB in the beginning and 311.4 MB in the end (delta: 127.9 MB). Free memory was 147.2 MB in the beginning and 145.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 130.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:26:38,260 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 183.5 MB. Free memory is still 164.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 199.31 ms. Allocated memory is still 183.5 MB. Free memory was 147.8 MB in the beginning and 166.0 MB in the end (delta: -18.2 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.43 ms. Allocated memory is still 183.5 MB. Free memory was 166.0 MB in the beginning and 164.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 330.60 ms. Allocated memory is still 183.5 MB. Free memory was 164.6 MB in the beginning and 148.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 25.74 ms. Allocated memory is still 183.5 MB. Free memory was 148.9 MB in the beginning and 147.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6751.61 ms. Allocated memory was 183.5 MB in the beginning and 311.4 MB in the end (delta: 127.9 MB). Free memory was 147.2 MB in the beginning and 145.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 130.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6710.8ms, OverallIterations: 11, TraceHistogramMax: 16, EmptinessCheckTime: 18.0ms, AutomataDifference: 1537.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 467 SDtfs, 229 SDslu, 1652 SDs, 0 SdLazy, 1341 SolverSat, 162 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1083.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 697 GetRequests, 611 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 540.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=127occurred in iteration=10, InterpolantAutomatonStates: 86, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 78.4ms AutomataMinimizationTime, 11 MinimizatonAttempts, 70 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 89.1ms SsaConstructionTime, 269.9ms SatisfiabilityAnalysisTime, 1986.0ms InterpolantComputationTime, 702 NumberOfCodeBlocks, 650 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 691 ConstructedInterpolants, 0 QuantifiedInterpolants, 2270 SizeOfPredicates, 32 NumberOfNonLiveVariables, 1900 ConjunctsInSsa, 160 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 1558/1653 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...